Scientific Name
Craterocephalus lacustris

Common Name
Kutubu hardyhead

Biology
Dorsal spines (total): 6 - 9; Dorsal soft rays (total): 7-9; Anal spines: 1; Anal soft rays: 8 - 10

Classification

Classified By

Trewavas, 1940

Class

Ray-finned fishes (Actinopterygii)

Order

Silversides (Atheriniformes)

Family

Silversides (Atherinidae)

Distribution

Region

Oceania

Distribution

Oceania: known only from Lake Kutubu and its outlet stream, the Soro River, Papua New Guinea.

Range

6°S - 7°S

Environment

Climate

Tropical

Water Temperature From

22 °C

Water Temperature To

24 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; ; pH range: 7.0 - 8.0; dH range: ? - 15 benthopelagic

Trophic Level

2.99 s.e. 0.39 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

14.0 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 to moderate vulnerability (26 of 100)

Resilience

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

Threat To Humans

Harmless

IUCN Red List Status

Vulnerable (VU) (A2cd)