Scientific Name
Chaenogobius annularis

Common Name
Forktongue goby

Biology
Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 9-12; Anal spines: 1; Anal soft rays: 8 - 10; Vertebrae: 32 - 33. This species is characterized by the following: scales in longitudinal series 61-67, transverse series 20-22, predorsal scales 17-24; a pair of sensory papillae in row f; modal ray count of second dorsal fin I,10; modal AP 2; modal vertebrae count 14+18; dorsal fins light brown with distinct dark-brown with wavy longitudinal bands; caudal and pectoral fins light brown with distinct dark-brown transverse bands; body and head light brown with approximately 6 broad, dark transverse bands; caudal fin base with several small, black spots and distinct blotch (Ref. 81467).

Classification

Classified By

Gill, 1859

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Gobies (Gobiidae)

Distribution

Region

Asia

Distribution

Asia: Japan and Korea. Reported occurrence elsewhere may be referring to other species of Gymnogobius.

Range

54°N - 34°N, 114°E - 141°E

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; demersal

Trophic Level

3.17 s.e. 0.29 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

16.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.7500 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 (30 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Least Concern (LC)