Main Ref. | Wetherbee, B.M., S.H. Gruber and E. Cortes, 1990 |
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Remarks | Found on the continental shelf and slope (Refs. 75154, 247). Mainly found on or near the bottom but readily occurs well off the substrate (Ref. 247, 58302). Often pelagic (Ref. 58302). Found singly or in small schools (Ref. 6871). Feeds mainly on deepwater bony fish, but also skates, other sharks (etmopterids in Ref. 123656), cephalopods and crustaceans (Refs. 5578, 568). This bioluminiscent shark (currently the largest luminous vertebrate) emit light ventrally to counterilluminate which might be used to illuminate the ocean floor while searching/hunting for prey; or to stealthily approach prey, using counterillumination camouflage, before striking fast when it is close enough (Ref. 123656). Ovoviviparous (Ref. 205), with 10-20 young born at 30-42 cm (Ref. 26346). |
Marine - Neritic | Marine - Oceanic | Brackishwater | Freshwater | |
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Marine zones / Brackish and freshwater bodies |
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Substrate | Benthic: mobile; Pelagic; |
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Substrate Ref. | Mundy, B.C., 2005 |
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Special habitats Ref. |
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Parasitism |
Feeding type | mainly animals (troph. 2.8 and up) |
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Feeding type Ref. | Cortés, E., 1999 |
Feeding habit | hunting macrofauna (predator) |
Feeding habit Ref. | Wetherbee, B.M., S.H. Gruber and E. Cortes, 1990 |
Estimation method | Original sample | Unfished population | Remark | ||
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Troph | s.e. | Troph | s.e. | ||
From diet composition | 4.23 | 0.36 | 4.05 | 0.60 | Troph of juv./adults from 2 studies. |
From individual food items | 4.30 | 0.82 | Trophic level estimated from a number of food items using a randomized resampling routine. | ||
Ref. | Cortés, E., 1999 |