''Xenisthmus balius'' is a species of fish in the

Xenisthmidae Collared wrigglers are perciform fishes in the family Xenisthmidae. They are native to the Indian and Pacific Oceans, where they are mostly reef A reef is a ridge or shoal of rock, coral or similar relatively stable material, lying beneath ...

(wriggler) family, which is regarded as a

synonymous A synonym is a word, morpheme, or phrase that means exactly or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words ''begin'', ''start'', ''commence'', and ''initiate'' are all ...

with the

Eleotridae Eleotridae is a family of fish commonly known as sleeper gobies, with about 34 genera and 180 species. Most species are found in the tropical Indo-Pacific region, but there are also species in subtropical and temperate regions, warmer parts of th ...

,. It is found in the Persian Gulf.Fishbase
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References

balius Balius (; Ancient Greek: Βάλιος, ''Balios'', possibly "dappled") and Xanthus (; Ancient Greek: Ξάνθος, ''Xanthos'', "blonde") were, according to Greek mythology, two immortal horses, the offspring of the harpy, Podarge and the West ...

Fish described in 1994 Fish of the Persian Gulf {{Gobiiformes-stub