Scientific Name
Callogobius okinawae

Common Name
Okinawa flap-headed goby

Biology
Dorsal spines (total): 7; Dorsal soft rays (total): 10; Anal spines: 1; Anal soft rays: 8. Body dark brown and clouded with black patches, color lighter on belly; dorsal fins with several series of spots; pectoral base with one dark patch on upper part; caudal brown; ventral and anal whitish. Longitudinal scales 44. Transverse scales 17. Maxillary does not reach eye. Head with several rows of papillae and dermal folds on snout, cheek and opercle. Several transversal folds under lower jaw. Longitudinal row of folds from corner of mouth and lower jaw are interrupted. No scales on nape anteriorly. First dorsal fin obtuse, middle rays longest; 2nd dorsal higher than the 1st, pointed posteriorly. Pectoral does not reach anal fin origin. Pelvic fin notched, connected by frenum and membrane. Caudal fin lanceolate.

Classification

Classified By

Snyder, 1908

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Gobies (Gobiidae)

Distribution

Region

Western Pacific

Distribution

Western Pacific: Philippines to Vanuatu, north to the Ryukyu Islands; Marshall Islands in Micronesia.

Range

30°N - 21°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

12 m

Zone

reef-associated

Environment

Marine; brackish; reef-associated; depth range ? - 12 m (Ref. 43541)

Trophic Level

3.22 s.e. 0.48 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

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

5.0 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 (14 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