Frog shark (Somniosus longus) is a ray-finned fish of the family Somniosidae. It inhabits marine (saltwater) waters. This species can reach a maximum total length of 110 cm. It occurs at depths between 250 and 1160 metres. With a trophic level of 4.1, it is a mid-level predator. It is assessed as Data Deficient on the IUCN Red List.
Vertebrae: 77 - 79. Somniosus longus is distinguished from S. rostratus in having a relatively longer second dorsal fin where overall length is almost equal to first dorsal fin 91-100% (vs. 76-88%); slightly larger eye with horizontal diameter more than 37% (mean 46%) of length from snout tip to eye (vs.
Behavioural data for Frog shark is currently being reviewed.
Marine; bathydemersal; depth range 250 - 1160 m . Subtropical
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