Largetooth cookiecutter shark (Isistius plutodus) fish species and Largetooth cookiecutter shark information

Scientific Name
Isistius plutodus

Common Name
Largetooth cookiecutter shark

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 0. The largetooth cookiecutter shark Isistius plutodus has no collar marking around throat, a small asymmetrical caudal fin with a short ventral lobe less than half the length of dorsal caudal margin, bigger mouth and gigantic lower teeth (proportionately the largest in any living shark) in 19 rows (upper teeth = 29 rows). Eyes set well forward on head, with extensive anterior binocular field. Pectoral fins rounded, pelvic fins smaller than dorsal fins. As with the other member of the genus Isistius, it has a characteristic small cigar-shaped body with two small close-set spineless dorsal fins far posterior on back, no anal fin, huge, triangular-cusped teeth without blades, short, bulbous snout and a unique suctorial lips (Ref. 247).

Classification

Classified By

Garrick & Springer, 1964

Class

Sharks and Rays (Elasmobranchii)

Order

Bramble, Sleeper and Dogfish sharks (Squaliformes)

Family

Sleeper sharks (Dalatiidae)

Distribution

Region

Western Atlantic

Distribution

Western Atlantic: off Alabama, USA and the Gulf of Mexico; including Brazil. Northwest Pacific: off Okinawa, Japan.

Range

30°N - 24°N

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

814 m

Depth To - meters

6440 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 814 - 6440 m (Ref. 55584)

Trophic Level

4.3 s.e. 0.60 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

False

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

42.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.6260 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: of no interest

Vulnerability

Low vulnerability (22 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be

Threat To Humans

Harmless

IUCN Red List Status

Least Concern (LC)

Largetooth cookiecutter shark (Isistius plutodus) fish species and information / pictures of Largetooth cookiecutter shark - Isistius plutodus

Largetooth cookiecutter shark (Isistius plutodus) fish species information

Classification

Distribution

Environment

Physical Size and Genetics

Human Uses and Population