Longnose tapirfish (Polyacanthonotus challengeri) fish species and information / pictures of Longnose tapirfish - Polyacanthonotus challengeri

Longnose tapirfish (Polyacanthonotus challengeri) fish species information

Scientific Name
Polyacanthonotus challengeri

Common Name
Longnose tapirfish

Biology
Dorsal spines (total): 32 - 35; Dorsal soft rays (total): 0; Vertebrae: 242 - 244. Caudal fin very small; anal fin with 161-162 rays altogether, 26-35 of which are spines, long, low, confluent with caudal; pectorals with a fleshy base (Ref. 6885). Cream to faintly pink, possibly with light brown markings; black on posterior margins of anal and caudal fins; black on posterior edge of gill cover, lining of mouth and gill chamber, and parts of peritoneum (Ref. 6885).

Classification

Classified By

Vaillant, 1888

Class

Ray-finned fishes (Actinopterygii)

Order

Halosaurs and deep-sea Spiny eels (Notacanthiformes)

Family

Deep-sea spiny eels (Notacanthidae)

Distribution

Region

North Pacific

Distribution

North Pacific: Japan, Bering Sea and British Columbia, Canada (Ref. 6885), also south to Oregon, USA (Ref. 35578). South Pacific: known form one specimen collected near New Zealand. Southeast Atlantic: South Africa. Southern Ocean: known from one specimen collected near the Kerguelen Islands. Mainly antitropical (Ref. 5165) but reported from Azores, Canary Islands and Morocco (Ref. 6728).

Range

- 50°S

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

905 m

Depth To - meters

4560 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 905 - 4560 m (Ref. 50610), usually 2000 - 3000 m (Ref. 6728)

Trophic Level

3.19 s.e. 0.42 Based on food items.

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

60.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5630 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Moderate to high vulnerability (47 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (Assuming tmax>10)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated