Sharpnose Sevengill Shark Heptranchias perlo - The Shark Trust

Lateral view C<br />

1<br />

Scientific name<br />

<strong>Sharpnose</strong> <strong>Sevengill</strong> <strong>Shark</strong> <strong>Heptranchias</strong> <strong>perlo</strong><br />

<strong>Heptranchias</strong> <strong>perlo</strong> (Bonnaterre, 1788).<br />

diStribution<br />

Virtually circumglobal. East Atlantic from southern British<br />

Isles to Namibia, including the Mediterranean Seaiii . One<br />

record from Scotland.<br />

Map base conforms with ICES grid squares.<br />

No Records<br />

Occasional<br />

Range<br />

common name<br />

3<br />

SharpnoSe <strong>Sevengill</strong> <strong>Shark</strong>, One-Finned <strong>Shark</strong>,<br />

Perlon <strong>Shark</strong>, <strong>Sevengill</strong> Cow <strong>Shark</strong>, <strong>Sevengill</strong>ed<br />

Mediterranean <strong>Shark</strong>, Snouted <strong>Sevengill</strong> <strong>Shark</strong>,<br />

Slender <strong>Sevengill</strong> <strong>Shark</strong>, Requin Perlon (Fr),<br />

Cañabota Bocadulce (Es).<br />

identification<br />

1 Seven large gill slits.<br />

2 Sharply pointed snout.<br />

3 Single dorsal finii .<br />

Ventral view C<br />

colour<br />

Brown-grey dorsally.<br />

Lighter ventrally.<br />

Fins may have pale posterior margins.<br />

Faint dark blotches, more prominent in juvenilesi .<br />

biology and Size<br />

Born: 25cm. Mature: 90–105cm C, 75–85cm .<br />

Max TL: 140cmi .<br />

Litters of 6–20 pups have been recordediv .<br />

Generalist predator feeding on crustaceans, molluscs,<br />

teleost fish and other elasmobranchsi .<br />

2<br />

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<strong>Sharpnose</strong> <strong>Sevengill</strong> <strong>Shark</strong> HXT01/01/09<br />

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Sponsored by:<br />

Similar SpecieS<br />

<strong>Heptranchias</strong> <strong>perlo</strong>, <strong>Sharpnose</strong> <strong>Sevengill</strong> <strong>Shark</strong><br />

Hexanchus griseus, Bluntnose Sixgill <strong>Shark</strong><br />

Hexanchus nakamurai, Bigeye Sixgill <strong>Shark</strong><br />

Chlamydoselachus anguineus, Frilled <strong>Shark</strong><br />

27–1,000mi , most common 300–600miv .<br />

Usually found on or near the seabed although has been<br />

recorded pelagically near the surfacei .<br />

Possibly aggregate around subsurface features such<br />

seamountsiv Habitat<br />

.<br />

<strong>Sharpnose</strong> <strong>Sevengill</strong> <strong>Shark</strong><br />

conServation StatuS<br />

commercial importance<br />

Handle with care.<br />

Sharp teeth.<br />

Abrasive skin.<br />

First 3 or 4 in upper jaw<br />

are narrow with hooklike<br />

cusps.<br />

All subsequent teeth<br />

have 1 or 2 small cusps.<br />

Lower teeth are broad<br />

and comb-shaped.<br />

Small symmetrical tooth<br />

at symphysis.<br />

18–22 upper teeth, 11<br />

lower teethi .<br />

No species-specific data available. Wide ranging<br />

uncommon species which is likely to have been<br />

affected by deepwater fishing effortiv .<br />

Red List status: Near Threatened (2003).<br />

Bycatch species in bottom and pelagic trawl and<br />

longline fisheries.<br />

Sometimes taken in significant numbers around<br />

features such as seamounts.<br />

Usually discarded although it may be utilised for<br />

human consumption or fishmealiv .<br />

Handling<br />

referenceS<br />

i. Bester, C; Unknown. FLMNH.<br />

ii. Compagno, L, J, V; 1984. FAO.<br />

iii. Henderson, A, C et al; 2001. JMBA.<br />

iv. Paul, L et al; 2003. IUCN.