Trimma meranyx Winterbotton, Erdmann, Dita & Cahyani, 2014

Day-night pygmy goby
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Trimma meranyx   AquaMaps   Data sources: GBIF OBIS
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Actinoptérygiens (poissons à nageoires rayonnées) > Perciformes (Perch-likes) > Gobiidae (Gobies) > Gobiinae
Etymology: Trimma: Greek, trimma, -atos = something crushed (Ref. 45335);  meranyx: Name from Greek words 'mera' meaning day, and 'nyx' meaning night, for ‘day-night pygmy goby’, referring to its unique colouration of a black peduncle with twin 'suns' dorsally and ventrally; noun in apposition.

Environment: milieu / climate zone / depth range / distribution range Écologie

; marin récifal; profondeur 45 - 70 m (Ref. 96671).   Tropical

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Western Pacific: Indonesia, Papua New Guinea; photographic taken from the Philippines and Vanuatu.

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 1.9 cm SL (female)

Description synthétique Morphologie | Morphométrie

Épines dorsales (Total): 7; Rayons mous dorsaux (Total): 8; Épines anales 1; Rayons mous anaux: 8. This species is distinguished by the following set of characters: a narrow bony interorbital (< 55% pupil width), predorsal midline with 8-9 scales; cycloid scales usually along the upper border of the opercle which may be in up to 3 horizontal rows; 2 (usually cycloid) cheek scales; a very slightly elongate second dorsal spine usually reaching posteriorly to between the base of the spine and the base of the second ray of the second dorsal fin; unbranched pectoral-fin rays; fifth pelvic-fin ray which branches once dichotomously and is 64-85% the length of the fourth ray; a full basal membrane connecting the inner margins of the fifth pelvic fins rays in undamaged specimens; black posterior half of the caudal peduncle with a large white spot dorsally and ventrally just anterior to the procurrent caudal fin rays is unique within the genus (Ref. 96671).

Biologie     Glossaire (ex. epibenthic)

Most specimens of this 'twilight zone' species are reported from the 70 m depth range (though have been collected as shallow as 45-55 m in the Lembeh Strait). The species do not appear to school or aggregate as with many congeners, but rather are found individually in small caves and crevices, frequently quite deep into the interstices of the reef and only visible using a strong underwater flashlight. Specimens collected were found exclusively on deep reefs sheltered from wave exposure but nonetheless exposed to currents, and although there was frequently significant silt build-up present in the caves in which they sheltered, water visibility was always good because of the significant water flow over the reefs (Ref. 96671).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Winterbottom, R., M.V. Erdmann and N.K. Dita Cahyani, 2014. Three new species of Trimma (Pisces; Gobioidei) from Indonesia. Zootaxa 3838(3):367-384. (Ref. 96671)

Statut dans la liste rouge de l'IUCN (Ref. 120744)

  Non évalué 

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 26.7 - 29, mean 27.7 (based on 16 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00414 - 0.01834), b=3.08 (2.90 - 3.26), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Résilience (Ref. 69278):  Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité (Ref. 59153):  Low vulnerability (10 of 100) .