Hydrolagus macrophthalmus de Buen, 1959
Big eye chimaera
Hydrolagus macrophthalmus
photo by Reyes, P.

 Family:  Chimaeridae (Shortnose chimaeras or ratfishes)
 Max. size:  63.9 cm TL (male/unsexed); 58.1 cm TL (female)
 Environment:  demersal; depth range 590 - 1160 m
 Distribution:  Eastern Pacific: from the central coast of Mexico, Costa Rica, Peru and Chile.
 Diagnosis:  This species is distinguished by the following set of characters: slender body; short and bluntly rounded snout; relatively short head (HDL 24.2-24.5% BDL); relatively large eyes (EYL 30.9-34.2% HDL); oral and preopercular lateral line canals sharing a short common branch from the infraorbital canal; relatively large pectoral fins (P1A 36.5-40.8% BDL), extending posterior to the insertion of pelvic fins; trunk's lateral line canal without sinusoidal undulations; the anterior and posterior regions of second dorsal fin considerably taller than middle region; no anal fin; tail region elongate and slender (PCA 58.3-59.9% BDL); caudal-fin axis horizontal with the fin nearly symmetrical, epaxial and hypaxial lobes equal sized; coloration uniform brown across entire body, no white markings and bluish fins (Ref. 97389).
 Biology:  Oviparous (Ref. 205). Eggs are encased in horny shells (Ref. 205).
 IUCN Red List Status: Data deficient  (Ref. 96402)
 Threat to humans:  harmless
 Country info:   
 

 Entered by: Garilao, Cristina V. - 07.02.00
 Modified by: Capuli, Estelita Emily - 31.03.16

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