Crescent dwarfgoby (Eviota bilunula), first described by Greenfield & Suzuki, 2016 is a tiny fish in the family Gobiidae (order Gobiiformes). Adults typically reach 1.10 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Data Deficient.The species is kept in the aquarium hobby. Care requirements and behaviour align broadly with other Gobiidae kept in the hobby.
Dorsal spines (total): 7; Dorsal soft rays (total): 7 - 8; Anal spines: 1; Anal soft rays: 7. This species is distinguished by the following characters: cephalic sensory-canal pore system missing only IT pore (pattern 2); dorsal/anal fin-ray formula 7/7 or 8/7; unbranched pectoral-fin rays; 5th pelvic-fin ray 15.9-16.4% of 4th ray; presence of a narrow dark bar at caudal-fin base; with a red line extending down from under eye to jaws; there are 5 postanal ventral-midline spots associated with subcutaneous bars; 2 distinctive black crescent-shaped marks present underneath the pectoral fin .: elongated; Cross section: oval.
Behavioural data for Crescent dwarfgoby is currently being reviewed.
Marine; reef-associated; depth range ? - 14 m . Tropical Central Pacific: Fiji.
The following diseases are known to affect Crescent dwarfgoby.
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