Lightfish (Ichthyococcus ovatus) fish species and information / pictures of Lightfish - Ichthyococcus ovatus

Lightfish (Ichthyococcus ovatus) fish species information

Scientific Name
Ichthyococcus ovatus

Common Name
Lightfish

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 11-12; Anal spines: 0; Anal soft rays: 15 - 17. Brown-yellow in color, flanks silver; fin bases and edges of scale pockets black (Ref. 3988). Both dorsal and ventral adipose fins present (Ref. 3988). Short, deep body, small mouth with lower jaw, microscopic teeth and tubular eye (Ref. 37473).

Classification

Classified By

Cocco, 1838

Class

Ray-finned fishes (Actinopterygii)

Order

Lightfishes and Dragonfishes (Stomiiformes)

Family

Lightfishes (Phosichthyidae)

Distribution

Region

Circumglobal except North Pacific. Southwest Pacific

Distribution

Circumglobal except North Pacific. Southwest Pacific: Australia (Ref. 7300) and New Zealand (Ref. 5755). Southeast Pacific: Chile (Ref. 9068). Eastern Atlantic: scattered records along Azores and the Mediterranean, from Portugal south to Canary Islands, also Namibia. Western Atlantic: between 20?N-45?N, including the Gulf of Mexico (Ref. 27768). South China Sea (Ref.74511).

Range

46°N - 20°S, 180°W - 180°E

Environment

Climate

Deep-water

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

2500 m

Zone

bathyalpelagic

Environment

Marine; bathypelagic; depth range 0 - 2500 m (Ref. 74511), usually 200 - 500 m (Ref. 3988)

Trophic Level

3.4 s.e. 0.45 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

5.5 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5078 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Unknown

Vulnerability

Low vulnerability (10 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