Butis butis - (Vaneya)

Family:	Eleotridae (Sleepers) , subfamily: Butinae
Order:	Perciformes (perch-likes)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Duckbill sleeper
Max. size:	15.0 cm TL (male/unsexed; Ref. 6802)
Environment:	demersal; amphidromous; pH range: 7 - 8; dH range: 9 - 19
Climate:	tropical; 22 - 28°C
Global Importance:	fisheries: minor commercial
Resilience:	High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Distribution:	Indo-West Pacific: East Africa to Fiji (Ref. 6820).
Diagnosis:	Dorsal spines (total): 7-7; Dorsal soft rays (total): 8-8; Anal spines: 1-1; Anal soft rays: 8-9. Dark longitudinal lines on body; caudal fin black with light margin dorsally; pectoral base with 1-2 black spots (Ref. 5493).
Biology:	Inhabits brackish mangrove estuaries and lower reaches of freshwater streams, usually on mud bottoms (Ref. 44894). Usually found in lagoons and estuaries, particularly where there is vegetation (Ref. 6028, 79840). Occurs frequently in mangrove swamps (Ref. 2847, 79840). Occasionally ascends rivers (Ref. 6028). Feeds mainly on small fishes and crustaceans (Ref. 6028, 79840). Marketed fresh (Ref. 12693)
Threatened:	, (Ref. 36508)
Dangerous:	harmless
Coordinator:

Sri Lanka country information
Common names:	Upside down sleeper, Vaneya