Carinotetraodon borneensis (Regan 1903)

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 (Ref. 39332).

Dorsal soft rays (total): 12 - 13; Analsoft rays: 11 - 13; Vertebrae: 16 - 17

Carinotetraodon borneensis, sometimes known as the Bornean red-eye puffer, is a species of pufferfish in the family Tetraodontidae. It is a tropical freshwater species known only from southern Sarawak, Malaysia. It reaches 4.4 cm (1.7 inches) SL and is sometimes seen in the aquarium trade.