North Pacific daggertooth (Anotopterus nikparini) fish species and information / pictures of North Pacific daggertooth - Anotopterus nikparini

North Pacific daggertooth (Anotopterus nikparini) fish species information

Scientific Name
Anotopterus nikparini

Common Name
North Pacific daggertooth

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 14 - 17; Vertebrae: 78 - 80. Dark brownish, silvery ventrally; paired fins and caudal fin uniformly black. Body extremely elongate. Large adults with a pair of dermal keels midlaterally on each side. Small, flexible projection at tip of lower jaw. Gill membranes joined forward, below anterior edge of eye, and free from isthmus. No rayed dorsal fin. No scales (Ref. 43939). In adults, head depth 29-33% of lower jaw length. Postorbital area 8.1-9.7% SL or 34.4-38.8% (less than 3 times smaller than HL). Rear edge of gill cover overlaps with the vertical of the 5th vertebrae. Postadipose distance 7-8% SL (Ref. 31260).

Classification

Classified By

Kukuev, 1998

Class

Ray-finned fishes (Actinopterygii)

Order

Grinners (Aulopiformes)

Family

Daggertooth (Anotopteridae)

Distribution

Region

North Pacific

Distribution

North Pacific: Bering Sea and Gulf of Alaska; south in Pacific waters to about 25?N, south of Baja California and Japan.

Range

Unknown

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

2750 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 0 - 2750 m (Ref. 31260), usually 0 - 700 m (Ref. 31260)

Trophic Level

4.5 s.e. 0.80 Based on diet studies.

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

146 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.7500 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Moderate vulnerability (43 of 100)

Resilience

High, minimum population doubling time less than 15 months (K=0.5)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated