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Setting up your tank

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Mannar croaker (Johnius mannarensis) fish species and information / pictures of Mannar croaker - Johnius mannarensis

Mannar croaker (Johnius mannarensis) fish species information

Scientific Name
Johnius mannarensis

Common Name
Mannar croaker

Biology
Dorsal soft rays (total): 27-30. Scales small. Head scales all cycloid. Total number of scales above and below the lateral line 19-23 (mean= 20).

Classification

Classified By

Mohan, 1971

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Drums or croakers (Sciaenidae)

Distribution

Region

Indian Ocean

Distribution

Indian Ocean: restricted to the southeast coasts of India and Sri Lanka.

Range

Unknown

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Marine; demersal

Trophic Level

3.25 s.e. 0.39 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

16.0 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 (16 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