California headlightfish (Diaphus theta) fish species and information / pictures of California headlightfish - Diaphus theta

California headlightfish (Diaphus theta) fish species information

Scientific Name
Diaphus theta

Common Name
California headlightfish

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 12-14; Anal spines: 0; Anal soft rays: 12 - 14; Vertebrae: 34 - 36. Adipose small, narrow based, slender (Ref. 6885). Brown to black on dorsal surface, lighter ventrally; fins pale (Ref. 6885). Branchiostegal rays: 9 (Ref. 31442).

Classification

Classified By

Eigenmann & Eigenmann, 1890

Class

Ray-finned fishes (Actinopterygii)

Order

Lanternfishes (Myctophiformes)

Family

Lanternfishes (Myctophidae)

Distribution

Region

Eastern Pacific

Distribution

Eastern Pacific: common in California Current region to 20?S (Ref. 31442), including Hawaii (Ref. 4925). Northwest Pacific: throughout subarctic-transitional waters to northern Japan (Ref. 31442).

Range

66°N - 20°S

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

3400 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 0 - 3400 m (Ref. 50550), usually 10 - 400 m (Ref. 28981)

Trophic Level

3.13 s.e. 0.25 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

11.4 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low to moderate vulnerability (27 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated