Hidden ilisha (Ilisha obfuscata) fish species and information / pictures of Hidden ilisha - Ilisha obfuscata

Hidden ilisha (Ilisha obfuscata) fish species information

Scientific Name
Ilisha obfuscata

Common Name
Hidden ilisha

Biology
Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 39 - 42. Belly with 19 or 20 + 8, total 27 or 28 scutes. Eye large, lower jaw projecting. Dorsal fin origin at about midpoint of body; anal fin origin under or just behind final dorsal fin rays. Vertical striae on scales traversing whole scale or overlapping across center of scale. Swim bladder with two very short tubes passing back in the muscles on either side of haemal spines.

Classification

Classified By

Wongratana, 1983

Class

Ray-finned fishes (Actinopterygii)

Order

Herrings (Clupeiformes)

Family

Pristigasterids (Pristigasteridae)

Distribution

Region

Indian Ocean

Distribution

Indian Ocean: known only from Bombay and Pondicherry.

Range

18°N - 8°N, 68°E - 85°E

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

50 m

Zone

pelagic-neritic

Environment

Marine; brackish; pelagic-neritic; depth range 0 - 50 m (Ref. 188)

Trophic Level

3.25 s.e. 0.50 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

7.4 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 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