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List of Freshwater Fishes reported from Guatemala
n = 171
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Table 1: 168 species currently present in the country/island (endemic, native, introduced, reintroduced);
Table 2: 1 species possibly present in the country/island (stray, questionable);
Table 3: 2 species demonstrated to be absent in the country/island (extirpated, not established, misidentification, error).
Table 4: 171 species reported from the country/island altogether.
Table : 171 .
     
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Family Species Author Info Occurrence Common names Abundance Max length Maturity Remark Photo
Achiridae Achirus mazatlanus (Steindachner, 1869) Fr, Br, M native   22.50 cm TL male/unsexed   
Poeciliidae Alfaro huberi (Fowler, 1923) Fr native   5.00 cm TL male/unsexed ;7.00 cm female   
Cichlidae Amatitlania nigrofasciata (Günther, 1867) Fr native  Serica (Spanish)  10.00 cm SL male/unsexed  Type locality, Lake Amatitlán (apparently not Lake Atitlán), BMNH 1865.4.19.76 (lectotype of Amatitlania nigrofasciata, 6.4 cm SL). Known from the Pacific slope, Rio Suchiate; from the Atlantic slope in Río Jutiapa (Ref. 74403). Also Ref. 6466, 1739. 
Cichlidae Amphilophus trimaculatus (Günther, 1867) Fr native   36.50 cm SL male/unsexed ;25.00 cm TL female  Also Ref. 1739. 
Anablepidae Anableps dowii Gill, 1861 Fr native   22.00 cm TL male/unsexed ;34.00 cm TL female   
Engraulidae Anchoa belizensis (Thomerson & Greenfield, 1975) Fr native   5.80 cm SL male/unsexed  Reported from Rio Dulce and Lake Yzabel (Ref. 189). 
Engraulidae Anchoa curta (Jordan & Gilbert, 1882) Fr, Br, M native   8.90 cm TL male/unsexed   
Engraulidae Anchoa parva (Meek & Hildebrand, 1923) Fr, Br, M native   9.10 cm TL male/unsexed   
Anguillidae Anguilla rostrata (Lesueur, 1817) Fr, Br, M native   152 cm TL male/unsexed ;122 cm TL female   
Sciaenidae Aplodinotus grunniens Rafinesque, 1819 Fr native  common (usually seen) 95.00 cm TL male/unsexed  Known from the Usumacinta River (Ref. 36888). 
Ariidae Ariopsis assimilis (Günther, 1864) Fr, Br native   35.00 cm TL male/unsexed  Also Ref. 58022. 
Ariidae Ariopsis seemanni (Günther, 1864) Fr, Br, M native   44.40 cm TL male/unsexed   
Cichlidae Astatheros macracanthus (Günther, 1864) Fr native   25.00 cm SL male/unsexed  Found in Rio Motagua. Known also from the Rio Lempa to the Rio Paz. Also Ref. 12251. 
Characidae Astyanax aeneus (Günther, 1860) Fr native   7.50 cm SL male/unsexed ;12.00 cm SL female   
Characidae Astyanax bacalarensis Schmitter-Soto, 2017 Fr native   9.48 cm SL male/unsexed  Found in Mopán (Ref. 118583).  No picture yet.
Characidae Astyanax baileyi (Rosen, 1972) Fr native   6.85 cm SL male/unsexed  Found in the Usumacinta River basin (Ref. 38376). 
Characidae Astyanax belizianus (Bocourt, 1868) Fr native    Range to south to tributaries of Lake Izabal (Ref. 118583).  No picture yet.
Characidae Astyanax brevimanus (Günther, 1864) Fr native    Reported from south and east to Quiché and Baja Verapaz, Guatemala.  No picture yet.
Characidae Astyanax cubilhuitz Schmitter-Soto, 2017 Fr native  Cubilhuitz tetra (Spanish), Sardinita del Cubilhuitz (Spanish)  5.30 cm SL male/unsexed  Known from Río Dolores, a stream near Cubilhuitz isolated by a subterranean segment, Alta Verapaz (Ref. 118583).  No picture yet.
Characidae Astyanax dorioni (Rosen, 1970) Fr native   19.30 cm SL male/unsexed  Found in the Usumacinta River basin (Ref. 38376).  No picture yet.
Characidae Astyanax petenensis (Günther, 1864) Fr native  Petén tetra (English), Sardinita del Petén (Spanish)  10.85 cm SL male/unsexed  Type locality of Astyanax petenensis, Lake Petén (Ref. 118583).  No picture yet.
Atherinopsidae Atherinella argentea Chernoff, 1986 Fr, Br, M native   11.10 cm SL male/unsexed   
Atherinopsidae Atherinella guatemalensis (Günther, 1864) Fr, Br, M native   9.10 cm SL male/unsexed  Ranges eastward to Salína de Acapán (Ref. 9273). 
Atherinopsidae Atherinella guija (Hildebrand, 1925) Fr native    Occurrence in country (Dyer, pers. comm).  No picture yet.
Atherinopsidae Atherinella meeki (Miller, 1907) Fr native    Type locality, Río Montagua, east coast of Guatemala (Ref. 26282).  No picture yet.
Lepisosteidae Atractosteus tropicus Gill, 1863 Fr native   125 cm TL male/unsexed   
Gobiidae Awaous banana (Valenciennes, 1837) Fr native   30.00 cm SL male/unsexed ;24.38 cm SL female  Known from Escuintla, Santa Rosa, Izabal and Zacapa. 
Batrachoididae Batrachoides goldmani Evermann & Goldsborough, 1902 Fr native   21.60 cm SL male/unsexed  Recorded from El Petén and Alta Verapaz (Ref. 30719). 
Batrachoididae Batrachoides waltersi Collette & Russo, 1981 Fr, Br, M native   29.20 cm SL male/unsexed   
Poeciliidae Belonesox belizanus Kner, 1860 Fr native   20.00 cm TL male/unsexed ;15.00 cm TL female   
Poeciliidae Brachyrhaphis hartwegi Rosen & Bailey, 1963 Fr native   3.50 cm TL male/unsexed ;5.00 cm female   
Bryconidae Brycon guatemalensis Regan, 1908 Fr native   59.00 cm TL male/unsexed  Occurs in the Grijalva River (Ref. 6858). 
Carcharhinidae Carcharhinus leucas (Valenciennes, 1839) Fr, Br, M native   360 cm TL male/unsexed ;400 cm TL female  Found in Lake Ysabel.  
Poeciliidae Carlhubbsia kidderi (Hubbs, 1936) Fr native   5.00 cm TL male/unsexed ;6.00 cm female  Found in Alta Vera Paz. 
Poeciliidae Carlhubbsia stuarti Rosen & Bailey, 1959 Fr native   5.50 cm SL male/unsexed ;4.50 cm female  Known from the Rio Polochic system and Lake Izabal. Also Ref. 42936. 
Ariidae Cathorops aguadulce (Meek, 1904) Fr native   22.70 cm SL male/unsexed  Known from Izabal Lake (Ref. 58032). Materials examined from the río Usumacinta and Izabal Lake basins, formerly considered as Cathorops aguadulce, are treated as Cathorops kailolae by Marceniuk & Betancur-R., 2008 (Ref. 75004).  No picture yet.
Ariidae Cathorops fuerthii (Steindachner, 1876) Fr, Br, M native   31.20 cm TL male/unsexed   
Ariidae Cathorops kailolae Marceniuk & Betancur-R., 2008 Fr native  Kailola's sea catfish (English), Bagre de Kailola (Spanish)  25.40 cm SL male/unsexed  Known from lago Izabal basin and rio Usumacinta basin (Ref. 75004). 
Ariidae Cathorops melanopus (Günther, 1864) Fr native   23.00 cm TL male/unsexed  Known from the Rio Motagua (Ref. 6868, 75004). 
Ariidae Cathorops steindachneri (Gilbert & Starks, 1904) Fr, Br, M native   36.00 cm TL male/unsexed   
Centropomidae Centropomus ensiferus Poey, 1860 Fr, Br, M native   36.20 cm TL male/unsexed   
Centropomidae Centropomus nigrescens Günther, 1864 Fr, Br, M native   123 cm TL male/unsexed   
Centropomidae Centropomus parallelus Poey, 1860 Fr, Br, M native   72.00 cm TL male/unsexed   
Centropomidae Centropomus pectinatus Poey, 1860 Fr, Br, M native   56.00 cm TL male/unsexed   
Cichlidae Chiapaheros grammodes (Taylor & Miller, 1980) Fr native   20.30 cm SL male/unsexed  Known from the Rio Lagartero, Huehuetenango. Also Ref. 7335, 36377. 
Cichlidae Chuco godmanni (Günther, 1862) Fr native   30.00 cm TL male/unsexed  Known from the Polochic River basin (Ref. 36377). Restricted to the upper reaches of the Lake Izabal basin, in the Rio Polochic, Rio Cahabon, and Rio Dulce and their tributaries (Ref. 7335). Also Ref. 42936. 
Cichlidae Chuco intermedium (Günther, 1862) Fr native   20.00 cm SL male/unsexed  Recorded from the Rio Moho and Lake Peten (Ref. 7335). Reported from the Usumacinta drainage (Ref. 36377). 
Cichlidae Chuco microphthalmus (Günther, 1862) Fr native   25.00 cm SL male/unsexed  Known only from the Rio Motagua basin including Lago Amatitlan. 
Cichlidae Cincelichthys bocourti (Vaillant & Pellegrin, 1902) Fr native   20.00 cm SL male/unsexed  Known from the Lago de Izabal and the lower Rio Polochic. Also Ref. 42936. 
Cichlidae Cincelichthys pearsei (Hubbs, 1936) Fr native   20.00 cm SL male/unsexed   
Cyclopsettidae Citharichthys gilberti Jenkins & Evermann, 1889 Fr, Br, M native   27.90 cm TL male/unsexed  In range Ref. 11482. 
Cichlidae Cribroheros longimanus (Günther, 1867) Fr native  Viejito (Spanish), Red breast cichlid (English), Viejitos (Spanish)  13.50 cm SL male/unsexed  Found in Rio Nahualte. 
Cichlidae Cribroheros robertsoni (Regan, 1905) Fr native   19.00 cm SL male/unsexed  Occurs in the Lago Peten basin. 
Cichlidae Cryptoheros cutteri (Fowler, 1932) Fr native   11.20 cm SL male/unsexed  Known from Ríos Achuelo, Matasano, and others (Ref. 74403). 
Cichlidae Cryptoheros spilurus (Günther, 1862) Fr native   12.00 cm TL male/unsexed ;8.00 cm TL female  Known from Rio Polochic and Rio Sarstoon. Also Ref. 1672, 36377 
Gobiidae Ctenogobius claytonii (Meek, 1902) Fr native   5.80 cm SL male/unsexed    No picture yet.
Rivulidae Cynodonichthys godmani (Regan, 1907) Fr native     
Rivulidae Cynodonichthys tenuis Meek, 1904 Fr native   6.50 cm TL male/unsexed   
Cyprinidae Cyprinus carpio Linnaeus, 1758 Fr, Aq introduced   120 cm TL male/unsexed   
Mugilidae Dajaus monticola (Bancroft, 1834) Fr, Br native   36.00 cm TL male/unsexed   
Eleotridae Dormitator latifrons (Richardson, 1844) Fr, Br, M native   41.00 cm TL male/unsexed ;39.00 cm TL female   
Eleotridae Dormitator maculatus (Bloch, 1792) Fr native   70.00 cm TL male/unsexed   
Dorosomatidae Dorosoma anale Meek, 1904 Fr native   23.60 cm SL male/unsexed  Known from the Usumacinta River basin (Ref. 58459). 
Dorosomatidae Dorosoma petenense (Günther, 1867) Fr, Br, M native   33.00 cm TL male/unsexed  Also Ref. 93252. 
Eleotridae Eleotris picta Kner, 1863 Fr native   44.00 cm SL male/unsexed   
Eleotridae Eleotris pisonis (Gmelin, 1789) Fr native   25.00 cm TL male/unsexed   
Gerreidae Eucinostomus currani Zahuranec, 1980 Fr, Br, M native   21.00 cm TL male/unsexed   
Gerreidae Eucinostomus gracilis (Gill, 1862) Fr, Br, M native   21.00 cm TL male/unsexed   
Gerreidae Eugerres mexicanus (Steindachner, 1863) Fr native   24.20 cm SL male/unsexed  Found in northern Guatemala (Ref. 93806). Museum: AMNH 25367; UMMZ 189964, 143689 (Ref. 33568). 
Gerreidae Eugerres plumieri (Cuvier, 1830) Fr, Br, M native   40.00 cm TL male/unsexed   
Poeciliidae Gambusia luma Rosen & Bailey, 1963 Fr, Br native   4.20 cm SL male/unsexed ;4.00 cm female  Also Ref. 42936. 
Poeciliidae Gambusia nicaraguensis Günther, 1866 Fr, Br native   3.00 cm SL male/unsexed ;4.08 cm SL female   
Poeciliidae Gambusia sexradiata Hubbs, 1936 Fr, Br native   2.60 cm SL male/unsexed ;3.51 cm SL female  Recorded from the Rio Usumacinta drainage. 
Poeciliidae Gambusia yucatana Regan, 1914 Fr native   5.50 cm TL male/unsexed ;8.00 cm TL female  Known from the Lake Peten. 
Gerreidae Gerres cinereus (Walbaum, 1792) Fr, Br, M native   41.00 cm TL male/unsexed   
Eleotridae Gobiomorus dormitor Lacepède, 1800 Fr native   90.00 cm TL male/unsexed   
Eleotridae Gobiomorus maculatus (Günther, 1859) Fr, Br native   27.00 cm SL male/unsexed   
Gymnotidae Gymnotus carapo Linnaeus, 1758 Fr native   76.00 cm TL male/unsexed   
Gymnotidae Gymnotus cylindricus La Monte, 1935 Fr native    Found in the Motagua River basin (Ref. 36692). 
Gymnotidae Gymnotus maculosus Albert & Miller, 1995 Fr native    Type locality: diversion of channel from María Linda, 14°04'N, 90°37'W, ca. 20 km east of Escuintla, Depto. Santa Rosa, Guatemala (Ref. 26282). 
Poeciliidae Heterandria attenuata Rosen & Bailey, 1979 Fr endemic   6.20 cm SL male/unsexed ;7.00 cm female  Known only from the Rio Candelaria in Alta Verapaz where it lives in an isolated section of river hardly 10 km long (Ref. 26130).  No picture yet.
Characidae Hyphessobrycon milleri Durbin, 1908 Fr native   2.92 cm SL male/unsexed  Recorded from Zacapa, Los Amates in the Rio Motagua drainage.  No picture yet.
Hemiramphidae Hyporhamphus mexicanus Álvarez, 1959 Fr native   17.30 cm SL male/unsexed  Found in freshwater streams and lagoons of the Usumacinta River drainage in Petén (Ref. 40614). 
Ictaluridae Ictalurus meridionalis (Günther, 1864) Fr native   73.00 cm SL male/unsexed  Known from the Usumacinta basin (Ref. 87780).  No picture yet.
Catostomidae Ictiobus meridionalis (Günther, 1868) Fr native     
Mugilidae Joturus pichardi Poey, 1860 Fr, Br native   61.00 cm TL male/unsexed  Also Ref. 3791, 50865. 
Cichlidae Kihnichthys ufermanni (Allgayer, 2002) Fr native   25.00 cm SL male/unsexed  Known from Usumacinta River basin (Ref. 36377).  No picture yet.
Kuhliidae Kuhlia mugil (Forster, 1801) Fr, Br, M native   40.00 cm SL male/unsexed   
Centrarchidae Lepomis gibbosus (Linnaeus, 1758) Fr introduced   40.00 cm TL male/unsexed   
Eleotridae Leptophilypnus guatemalensis Thacker & Pezold, 2006 Fr native   3.66 cm SL male/unsexed  Known from the inland rivers in the Usumacinta watershed that drains into the Gulf of Mexico west of the Yucatan Peninsula. Type locality, Rio Ixcan drainage, 2400 m elevation, about 300 m below outfall from underground, Rio San Ramon, Huehuetenango, UMMZ 245081 (ex 197087), 3.66 cm SL, male) (Ref. 57711).  No picture yet.
Dorosomatidae Lile stolifera (Jordan & Gilbert, 1882) Fr, Br, M native   15.90 cm TL male/unsexed   
Cichlidae Mayaheros trispilus (Hubbs, 1935) Fr native    Known from Petén (Ref. 36377).  No picture yet.
Cichlidae Mayaheros urophthalmus (Günther, 1862) Fr, Br native   39.40 cm TL male/unsexed  Also Ref. 1739. 
Syngnathidae Microphis lineatus (Kaup, 1856) Fr native   19.40 cm SL male/unsexed   
Centrarchidae Micropterus salmoides (Lacepède, 1802) Fr introduced   97.00 cm TL male/unsexed  Destroyed local fish species; present in Lakes Atitlan and Calderas (Ref. 1739). One of the factors which led to the extinction of the Atitlán grebe (Podilymbus gigas), an endemic species (Ref. 79869). 
Mugilidae Mugil cephalus Linnaeus, 1758 Fr, Br, M native   100.00 cm SL male/unsexed   
Mugilidae Mugil curema Valenciennes, 1836 Fr, Br, M native   91.00 cm TL male/unsexed   
Carangidae Oligoplites palometa (Cuvier, 1832) Fr, Br, M native   49.70 cm TL male/unsexed   
Carangidae Oligoplites saurus (Bloch & Schneider, 1801) Fr, Br, M native   35.00 cm TL male/unsexed   
Synbranchidae Ophisternon aenigmaticum Rosen & Greenwood, 1976 Fr native   80.00 cm TL male/unsexed  Found in the Atlantic slope.  No picture yet.
Cichlidae Oreochromis aureus (Steindachner, 1864) Fr, Br, Aq introduced   45.70 cm TL male/unsexed   
Cichlidae Oreochromis mossambicus (Peters, 1852) Fr, Br, Aq introduced   39.00 cm SL male/unsexed  Widespread, cultivated in ponds and established in natural waters (Ref. 97395). 
Cichlidae Oreochromis niloticus (Linnaeus, 1758) Fr, Br, Aq introduced   60.00 cm SL male/unsexed   
Cichlidae Oscura heterospila (Hubbs, 1936) Fr native   24.00 cm SL male/unsexed  Restricted to the lower and middle reaches of the Rio Usumacinta basin. Also Ref. 12251. 
Cichlidae Parachromis friedrichsthalii (Heckel, 1840) Fr, Br native   28.00 cm SL male/unsexed  Found in Lago Peten and Laguna Cahabon. Also Ref. 4537. 
Cichlidae Parachromis loisellei (Bussing, 1989) Fr native  Guapote amarillo (Spanish)  18.50 cm SL male/unsexed  Known from the Lago de Izabal and the Rio Dulce. 
Cichlidae Parachromis managuensis (Günther, 1867) Fr, Aq introduced   55.00 cm TL male/unsexed   
Cichlidae Parachromis motaguensis (Günther, 1867) Fr, Br native   30.00 cm TL male/unsexed  Occurrence seems questionable. Recorded in the Rio Motagua basin and the Rio Naranjo (Ref. 7335, 12251, 36377). However, this species has been reported to be native to the Amazon basin and to have been introduced to Guatemala (Ref. 1739). Has established in aquaculture through unassisted reproduction and has not established in the wild (Ref. 1739). However, Ref. 7335 and 12251 state Guatemala and Honduras as native range. 
Cichlidae Petenia splendida Günther, 1862 Fr native   50.00 cm SL male/unsexed  Known from the Rio Usumacinta basin and the Lago Peten basin. Also Ref. 12251, 36377. 
Poeciliidae Phallichthys amates (Miller, 1907) Fr native   7.00 cm SL male/unsexed ;6.00 cm TL female   
Poeciliidae Phallichthys fairweatheri Rosen & Bailey, 1959 Fr native   3.75 cm SL male/unsexed ;4.50 cm female   
Poeciliidae Poecilia butleri Jordan, 1889 Fr native   7.00 cm TL male/unsexed ;8.00 cm TL female    No picture yet.
Poeciliidae Poecilia gillii (Kner, 1863) Fr questionable   6.00 cm TL male/unsexed ;10.50 cm TL female  Outside distributional range, occurrence needs confirmation. 
Poeciliidae Poecilia kykesis Poeser, 2002 Fr native   13.00 cm SL male/unsexed ;10.00 cm SL female  Type locality of Known from Lake Peten (Ref. 50894). 
Poeciliidae Poecilia mexicana Steindachner, 1863 Fr native   11.00 cm SL male/unsexed  Also Ref. 42936. 
Poeciliidae Poecilia petenensis Günther, 1866 Fr endemic   8.00 cm TL male/unsexed ;12.00 cm TL female  Type locality of Poecilia petenensis, Lake Péten; lectotype BMNH 1864,1.26.377 (Ref. 84929). Also Ref. 35631, 42987.  No picture yet.
Poeciliidae Poecilia rositae Meyer, Schneider, Radda, Wilde & Schartl, 2004 Fr native   5.02 cm SL male/unsexed  Known from the Río Cahabón system (Ref. 75917).  No picture yet.
Poeciliidae Poeciliopsis gracilis (Heckel, 1848) Fr native   9.00 cm TL male/unsexed   
Poeciliidae Poeciliopsis pleurospilus (Günther, 1866) Fr native   5.70 cm SL male/unsexed  Type locality, Lake of Dueñas (Ref. 54621).  No picture yet.
Ariidae Potamarius izabalensis Hubbs & Miller, 1960 Fr native   44.00 cm SL male/unsexed  Known from Izabal Lake and possibly the Polochic River (Ref. 39852). Also Ref. 6868. 
Ariidae Potamarius usumacintae Betancur-R. & Willink, 2007 Fr native  Usumacinta sea catfish (English), Mâchoiron Usumacinta (French), Bagre Usumacinta (Spanish)  59.50 cm SL male/unsexed  Type locality, Petén, Río San Pedro at junction with springfed lagoon at El Paso de Caballo, Río Usumacinta basin, UMMZ 248165 (ex 143461) (holotype of Potamarius usumacintae, 42.2 cm SL). Most specimens were collected from Río San Pedro and Río de la Pasión (Ref. 75770).  No picture yet.
Pristidae Pristis pectinata Latham, 1794 Fr, Br, M native  Pez sierra (Spanish)  760 cm TL male/unsexed  Known from Lake Izabal-Dulce River basin (Ref. 57708). 
Pristidae Pristis pristis (Linnaeus, 1758) Fr, Br, M native  Pez sierra (Spanish)  750 cm TL male/unsexed  Recorded from the Lake Izabal and Dulce River (Ref. 57708). 
Profundulidae Profundulus guatemalensis (Günther, 1866) Fr native   7.50 cm TL male/unsexed   
Profundulidae Profundulus punctatus (Günther, 1866) Fr native   10.00 cm TL male/unsexed   
Characidae Psalidodon fasciatus (Cuvier, 1819) Fr native   17.10 cm TL male/unsexed   
Syngnathidae Pseudophallus mindii (Meek & Hildebrand, 1923) Fr native   16.00 cm SL male/unsexed   
Syngnathidae Pseudophallus starksii (Jordan & Culver, 1895) Fr native   17.60 cm SL male/unsexed   
Poeciliidae Pseudoxiphophorus anzuetoi (Rosen & Bailey, 1979) Fr native   6.00 cm TL male/unsexed ;7.00 cm TL female  Known from the Motagua River basin in Departments of El Progreso, Zacapa, Chiquimula and Izabal; and Lempa River basin in the Departments of Chiquimula and Jutiapa (Ref. 50894). Type locality: Río Achuelo, south side of Gualán, Río Motagua drainage, Zacapa, Guatemala (Ref. 26282).  No picture yet.
Poeciliidae Pseudoxiphophorus bimaculatus (Heckel, 1848) Fr native   7.00 cm TL male/unsexed ;15.00 cm female  Known from Alta Verapaz. 
Poeciliidae Pseudoxiphophorus cataractae (Rosen, 1979) Fr endemic   6.00 cm SL male/unsexed ;6.50 cm female  Known from the Arroyo Sachicha, an upper course of the Rio Senizo that empties into Rio Salinas.  No picture yet.
Poeciliidae Pseudoxiphophorus diremptus (Rosen, 1979) Fr endemic   6.40 cm TL male/unsexed ;7.00 cm female  Known only from the Rio Chajamaic in Alta Verapaz.  No picture yet.
Poeciliidae Pseudoxiphophorus litoperas (Rosen & Bailey, 1979) Fr endemic   5.80 cm SL male/unsexed ;7.00 cm female  Known from the Polochic River basin, including both Polochic River and Cahabón River as far as streams flowing into Izabal Lake in Alta Verapaz and Izaba (Ref. 50894).  No picture yet.
Poeciliidae Pseudoxiphophorus obliquus (Rosen, 1979) Fr endemic   6.20 cm SL male/unsexed ;6.50 cm female  Knownf rom the Usumacinta River basin: Dolores River system, with a subterranean connection to Salinas River in Department Alta Vera Paz; and Ramón River system, with a subterranean connection to Ixcan River - Lacantún River (Ref. 50894).  No picture yet.
Heptapteridae Rhamdia guatemalensis (Günther, 1864) Fr native   25.10 cm SL male/unsexed    No picture yet.
Heptapteridae Rhamdia laticauda (Kner, 1858) Fr native   29.40 cm SL male/unsexed  Occurs in Lake Amatitlan and Río Montagua (Ref. 6868). Also Ref. 36914. 
Heptapteridae Rhamdia parryi Eigenmann & Eigenmann, 1888 Fr native      No picture yet.
Heptapteridae Rhamdia quelen (Quoy & Gaimard, 1824) Fr native   61.00 cm TL male/unsexed  Occurs in Río Dan Geronimo, Guatemala (Ref. 6868). 
Cichlidae Rheoheros lentiginosus (Steindachner, 1864) Fr native   25.00 cm TL male/unsexed  Known from the upper tributaries of the Rio Usumacinta system (Ref. 7335). Also Ref. 36377. 
Haemulidae Rhonciscus bayanus (Jordan & Evermann, 1898) Fr native   51.00 cm TL male/unsexed   
Haemulidae Rhonciscus crocro (Cuvier, 1830) Fr, Br, M native   38.00 cm TL male/unsexed   
Cichlidae Rocio octofasciata (Regan, 1903) Fr native   25.00 cm TL male/unsexed  Found in the Lago Peten basin. 
Cichlidae Rocio spinosissima (Vaillant & Pellegrin, 1902) Fr endemic   11.00 cm SL male/unsexed  Known from the upper river system of the Rio Polochic (Ref. 7335). Found in the Lake Izabal basin (Ref. 36377). 
Characidae Roeboides bouchellei Fowler, 1923 Fr native   8.20 cm SL male/unsexed  Known from lago Atascatempa (Ref. 26633). Also Ref. 36811. 
Characidae Roeboides guatemalensis (Günther, 1864) Fr misidentification   13.00 cm SL male/unsexed  Probably a misidentification. 
Poeciliidae Scolichthys greenwayi Rosen, 1967 Fr endemic   3.50 cm TL male/unsexed ;5.00 cm female  Known from the upper courses of the Rio Chixoy and the Rio Salinas system in Alta Verapaz. 
Poeciliidae Scolichthys iota Rosen, 1967 Fr endemic   2.50 cm TL male/unsexed ;3.50 cm female  Found in the Rio Chajmaic in Alta Verapaz.  No picture yet.
Gobiidae Sicydium multipunctatum Regan, 1906 Fr native      No picture yet.
Belonidae Strongylura exilis (Girard, 1854) Fr, Br, M native   91.00 cm TL male/unsexed   
Belonidae Strongylura hubbsi Collette, 1974 Fr native   49.80 cm SL male/unsexed  Type locality, Río de la Pasión immediately above mouth of Arroyo de Petexbatúm at Sayaxché, El Petén, UMMZ 194998 (holotype, 30.4 cm SL male) (Ref. 30949). Also Ref. 50279. 
Synbranchidae Synbranchus marmoratus Bloch, 1795 Fr native   150 cm TL male/unsexed   
Cichlidae Theraps irregularis Günther, 1862 Fr native   19.00 cm SL male/unsexed  Found in the upper reaches of the Lago Izabal basin in the Rio Polochic and the Rio Dulce and their tributareis. Recorded from the Rio Cienega. Also Ref. 42936. 
Cichlidae Thorichthys affinis (Günther, 1862) Fr native   14.00 cm SL male/unsexed  Known from the upper Usumacinta River basin (Ref. 36377). Reported from the Lago Peten basin (Ref. 7335). 
Cichlidae Thorichthys aureus (Günther, 1862) Fr native   15.00 cm SL male/unsexed  Restricted to the Lago de Izabal basin including the Rio Motagua and Rio Sarstoon. Also Ref. 12251, 42936. 
Cichlidae Thorichthys meeki Brind, 1918 Fr native   17.00 cm TL male/unsexed  Also Ref. 1739, 4537, 12251. 
Cichlidae Thorichthys pasionis (Rivas, 1962) Fr native   17.00 cm SL male/unsexed  Known from the Usumacinta River drainage (Ref. 36377). Recorded from Riachuelo Machaquila and Rio de la Pasion (Ref. 7335). 
Profundulidae Tlaloc candalarius (Hubbs, 1924) Fr native   8.00 cm TL male/unsexed   
Profundulidae Tlaloc labialis (Günther, 1866) Fr native   11.50 cm TL male/unsexed   
Cichlidae Trichromis salvini (Günther, 1862) Fr native   22.00 cm SL male/unsexed  Found in the Sulphur River near Puerto Barrios. Also Ref. 1739. 
Cichlidae Vieja bifasciata (Steindachner, 1864) Fr native   30.00 cm SL male/unsexed  Known from Rio Usumacinta basin. 
Cichlidae Vieja breidohri (Werner & Stawikowski, 1987) Fr misidentification   16.80 cm SL male/unsexed  Known from the Rio Lagartero, Huehuetenango. Also Ref. 12251. Occurrence in the country is not confirmed (Ref. 36377). 
Cichlidae Vieja guttulata (Günther, 1864) Fr native   30.00 cm TL male/unsexed  Recorded from the Lago Amatitlan. 
Cichlidae Vieja maculicauda (Regan, 1905) Fr, Br, Aq native   25.00 cm SL male/unsexed  Known from Lago de Izabal and Rio Sarstoon (Ref. 7335). Also found in the Usumacinta River drainage (Ref. 36377). Also Ref. 4537. 
Cichlidae Vieja melanurus (Günther, 1862) Fr native   35.00 cm TL male/unsexed  Known from the Usumacinta River drainage, De la Pasión and Lake Petén basins (Ref. 36377). Also Ref. 4537, 7335. 
Cichlidae Wajpamheros nourissati (Allgayer, 1989) Fr native   22.00 cm TL male/unsexed  Known from the Usumacinta River basin (Ref. 36377). 
Poeciliidae Xenodexia ctenolepis Hubbs, 1950 Fr endemic   4.00 cm TL male/unsexed ;4.50 cm female  Found in Rio Xalbal and Rio Chixoy in el Quiche and Alta Verapaz.  No picture yet.
Poeciliidae Xiphophorus alvarezi Rosen, 1960 Fr native   7.50 cm female  Found in Huehuetenango, El Quiche and Alta Veracruz (Ref. 26130); also in Alta Verapaz, la Candelaria-Yalicar (Ref. 42936). 
Poeciliidae Xiphophorus hellerii Heckel, 1848 Fr, Br native   14.00 cm TL male/unsexed ;16.00 cm TL female   
Poeciliidae Xiphophorus maculatus (Günther, 1866) Fr native   4.00 cm TL male/unsexed ;6.00 cm TL female  Occurrence needs confirmation (Ref. 1739). 
Poeciliidae Xiphophorus mayae Meyer & Schartl, 2002 Fr native   7.80 cm SL male/unsexed  Known from the Lake Izabal and Rio Polochic, Rio Dulce and Rio Motagua drainages (Ref. 42936). 
Poeciliidae Xiphophorus signum Rosen & Kallman, 1969 Fr endemic   7.50 cm TL male/unsexed  Known from the Rio Chajmaic as well as in the Rio de la Pasion basin in Alta Verapaz (Ref. 26130). Also Ref. 42936. 
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