Scientific Name
Eviota toshiyuki

Common Name
Toshiyuki's pygmygoby

Biology
Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 8. This species is distinguished from its congeners by the following set of characters: dorsal/anal fin-ray formula 9/8; pectoral fin rays 17, some branched; cephalic sensory-pore system pattern I (complete); absence of fifth segmented pelvic-fin ray; pelvic-fin membranes not well-developed; branches on fourth pelvic-fin ray 5-9; non-fimbriate genital papilla; dorsal fin with the first 2 spines filamentous; slender body 17.9-22.2%SL; 2 distinct dark spots on pectoral-fin base; a dark subcutaneous spot midlaterally at posterior end of caudal peduncle (Ref. 83982).

Classification

Classified By

Greenfield & Randall, 2010

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Gobies (Gobiidae)

Distribution

Region

Northwest Pacific

Distribution

Northwest Pacific: Known only from the Ryukyu and Ogasawara Islands, Japan.

Range

Unknown

Environment

Climate

Subtropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

3 m

Depth To - meters

8 m

Zone

reef-associated

Environment

Marine; reef-associated; depth range 3 - 8 m (Ref. 83982)

Trophic Level

s.e. 0.00 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

True

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

1.8 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

Unknown

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated