Longnose pygmy shark (Heteroscymnoides marleyi) fish species and information / pictures of Longnose pygmy shark - Heteroscymnoides marleyi

Longnose pygmy shark (Heteroscymnoides marleyi) fish species information

Scientific Name
Heteroscymnoides marleyi

Common Name
Longnose pygmy shark

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 0; Anal spines: 0; Anal soft rays: 0. A cylindrical, dwarf dogfish shark with a long bulbous snout, small round eyes, and small gill slits; caudal fin paddle-shaped (Ref. 5578). Dark brown with conspicuous light-edged fins (Ref. 5578). Ventral surface covered with minute photophores (Ref. 6577).

Classification

Classified By

Fowler, 1934

Class

Sharks and Rays (Elasmobranchii)

Order

Bramble, Sleeper and Dogfish sharks (Squaliformes)

Family

Sleeper sharks (Dalatiidae)

Distribution

Region

Southeast Atlantic

Distribution

Southeast Atlantic: near Ascension Island. Western Indian Ocean: Durban, Natal, South Africa.

Range

14°S - 30°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

502 m

Zone

benthopelagic

Environment

Marine; benthopelagic; depth range 0 - 502 m (Ref. 247)

Trophic Level

4.14 s.e. 0.58 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

29.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 1.0010 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 (15 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)