Sleepy goby

Psammogobius biocellatus is a goby which varies in colour from dark brown to blackish, marked with rows of small black spots along its flanks and 2-3 dark blotches along the back and upper flanks. There is a dark band on the first dorsal fin with more dark bands on the lower part of the caudal fin and narrow bands on the pelvic fins.^[2] It attains a maximum total length of 12 centimetres (4.7 in).^[3]

Psammogobius biocellatus is a widespread species and is distributed East Africa and through the Western Indian Ocean and the Pacific as far east as Fiji and Samoa, north to Japan and south to Australia.^[1]

The sleepy goby occurs in the intertidal zone in estuaries, lagoons and coastal rivers, often amongst mangroves where it burrowing into the silty-sand substrate, it may also be found in the lower reaches of freshwater streams.^[1] It buries itself in the sand.^[2]