Rhincodon typus Smith, 1828

Whale shark
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Rhincodon typus
Picture by Wirtz, P.

Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Orectolobiformes (Carpet sharks) > Rhincodontidae (Whale shark)
Etymology: Rhincodon: Greek, rhyngchos = snout + Greek, odous = teeth (Ref. 45335).

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

; marino; oceanodromo (Ref. 51243); distribuzione batimetrica 0 - 1928 m (Ref. 106604), usually 0 - 100 m (Ref. 89972).   Subtropical; 18°C - 30°C (Ref. 35465); 45°N - 48°S, 180°W - 180°E

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Circumglobal, all tropical and warm temperate seas except the Mediterranean.

Identified as one of the species with an unfavorable conservation status in Appendix II of the Bonn Convention for the Conservation of Migratory Species of Wild Animals in 1999. Classified as a highly migratory species, in Annex I of the 1982 United Nations Convention on the Law of the Sea (UNCLOS) which called for 'coordinated management and assessment to better understand cumulative impacts of fishing effort on the status of the shared populations' of these sharks (Ref. 26139).

Included in Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) since May 2003. This can partially implement the original objective of the FAO International Plan of Action for the Conservation and Management of Sharks (IPOA-Sharks). However, international trade still exists.


Length at first maturity / Size / Peso / Age

Maturity: Lm ?, range 440 - 560 cm
Max length : 1,700 cm TL maschio/sesso non determinato; (Ref. 48722); 2,000.0 cm TL (female); common length : 1,000 cm TL maschio/sesso non determinato; (Ref. 12757); peso massimo pubblicato: 34.0 t (Ref. 48722); Età massima riportata: 80 anni (Ref. 116781)

Short description Morfologia | Morfometria

Spine dorsali (totale): 0; Raggi dorsali molli (totale): 0; Spine anali 0; Raggi anali molli: 0. A huge, filter-feeding, blunt-headed shark with a distinct checkerboard pattern of yellow or white spots, on grey, bluish or blue-grey to green-brown back, white or yellowish underside, with horizontal and vertical stripes on back and sides of body; head broad and flat; snout short; mouth almost terminal, huge and transverse in front of eyes; prominent ridges on body, lowest terminating in a keel on caudal peduncle (Ref. 58085, 114967); nostrils with rudimentary barbels; long nasoral grooves; spiracles close to and larger than eyes; 5 exceptionally large gill openings, the fifth behind pectoral fin (Ref. 110893, 114967); numerous small, scale-like teeth and feeds by filtering plankton with special sieve-like modifications of the gill bars (Ref. 26938).

Biologia     Glossario (es. epibenthic)

World's largest fish, but is harmless to humans (Ref. 6871). Grows up to 20m (Ref. 48722). Often seen offshore but coming close inshore, sometimes entering lagoons or coral atolls (Ref. 247). Sometimes seen cruising near outer wall (Ref. 26938). Reported to frequent shallow water areas near estuaries and river mouths, sometimes during seasonal shrimp blooms (Ref. 48696). Found singly, or in aggregations of over 100 individuals (Ref. 5578). Often associated with groups of pelagic fishes, especially scombrids (Ref. 247). Highly migratory between ocean basins and national jurisdictions, but returns to the same sites annually (Ref. 48672). Feed on planktonic and nektonic prey, such as small fishes (sardines, anchovies, mackerel, juvenile tunas and albacore), small crustaceans and squids (Ref. 247). Often seen in a vertical position with the head at or near the surface when feeding (Ref. 13571). When actively feeding on zooplankton the sharks turn their heads from side to side, with part of the head lifted out of the water, and the mouth opened and closed 7-28 times per minute; these suction gulps were synchronized with the opening and closing of the gill slits (Ref. 35680). Ovoviviparous, with litter size of over 300 pups (Ref. 37816, 43278). Females of 438 to 562 cm are immature (FIGIS 09/2003). Utilized fresh, frozen, dried and salted for human consumption, liver processed for oil, fins used for shark-fin soup, offal probably for fishmeal (Ref. 13571), cartilage for health supplements and skin for leather products (Ref. 48723). Used in Chinese medicine (Ref. 12166). Highly valued commodity in ecotourism operations. Populations have been depleted in several countries by harpoon fisheries (Ref. 48696). Estimated longevity of 80.4 yrs is much larger than reported maximum age 38 yrs based on vertebral bands for a female of 11.9 m TL. Maximum length of up to 21 m and weight of up to 42 tons have been reported (Ref. 116781), but probably the most reliably measured size so far is 12 m TL (Ref. 26319).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

Distinct pairing with embrace (Ref. 205). Ovoviviparous (Ref. 35465). Embryos feed solely on yolk (Ref. 50449). Late term embryos shed their egg case within the uterus at a size of 58 to 64 cm TL (ovovivipary). The smallest free-living species are from 55-56 cm long, the smallest of which had an umbilical scar. A pregnant female has recently been found with 300 embryos, the largest of which were 58-64 cm (Refs. 26346, 35678).

Main reference Upload your references | Bibliografia | Coordinatore : Compagno, Leonard J.V. | Collaboratori

Colman, J.G., 1997. A review of the biology and ecology of the whale shark. J. Fish Biol. 51(6):1219-1234. (Ref. 26319)

IUCN Red List Status (Ref. 120744)

  Endangered (EN) (A2bd+4bd); Date assessed: 18 March 2016

CITES (Ref. 115941)


Threat to humans

  Harmless (Ref. 6871)





Human uses

Pesca: commerciale
FAO(pesca: species profile; publication : search) | FishSource | Sea Around Us

Informazioni ulteriori

Stati
Aree FAO
Ecosystems
Presenze
Introduzioni
Stocks
Ecologia
Dieta
Prede
Consumo di cibo
Razione
Nomi Comuni
Sinonimi
Metabolismo
Predatori
Ecotossicologia
Riproduzione
Maturità
Deposizione
Spawning aggregation
Fecundity
Uova
Egg development
Bibliografia
Acquacoltura
Profilo di acquacoltura
Varietà
Genetica
Frequenze alleliche
Ereditarietà
Malattie
Elaborazione
Mass conversion
Collaboratori
Immagini
Stamps, Coins Misc.
Suoni
Ciguatera
Velocità
Modalità di nuoto
Area branchiale
Otoliths
Cervelli
Vista

Strumenti

Special reports

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Fonti Internet

Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | DORIS | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Database Nazionali | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia(Go, ricerca) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 19.6 - 29, mean 27.3 (based on 5510 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 1.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278):  3.6   ±0.5 se; Based on diet studies.
Resilienza (Ref. 69278):  Molto basso, tempo minimo di raddoppiamento della popolazione più di 14 anni (K=0.02; Fec=16-300).
Vulnerability (Ref. 59153):  Very high vulnerability (87 of 100) .
Price category (Ref. 80766):   Unknown.