Carinotetraodon Borneensis (Carinotetraodon borneensis), first described by Regan, 1903 is a tiny fish in the family Tetraodontidae (order Tetraodontiformes). Adults typically reach 4.40 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. 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.
Dorsal soft rays (total): 12 - 13; Anal soft rays: 11 - 13; Vertebrae: 16 - 17. Males have a red dorsal fin, caudal fin proximal two-thirds grey, distal part black with white margin. Have the following combination of characters: dorsal fin rays 12-13 (mode 12); anal fin rays 11-13 (mode 11 or 13); pectoral fin rays 16; caudal fin rays 12; presence of black blotch on dorsal fin base in male; pectoral fin base black; dorsal fin base length 12.5-14.0 % SL; anal fin base length 10.2-10.9% SL .: short and / or deep; Cross section: circular.
Behavioural data for Carinotetraodon Borneensis is currently being reviewed.
Freshwater; benthopelagic. Tropical known only from southern Sarawak.
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