Betta splendens Regan, 1910
Siamese fighting fish
Betta splendens
photo by Nilsson, K.

Family:  Osphronemidae (Gouramies), subfamily: Macropodusinae
Max. size:  6.5 cm TL (male/unsexed); max. reported age: 2 years
Environment:  benthopelagic; freshwater; pH range: 6 - 8; dH range: 5 - 19
Distribution:  Asia: Mekong basin.
Diagnosis:  Dorsal spines (total): 1-1; Vertebrae: 29-34. Reddish bars on opercle (Ref. 12693).
Biology:  Occur in standing waters of floodplains, canals, rice paddies (Ref. 12693) and medium to large rivers (Ref. 12975). Feed on zooplankton, mosquito and other insect larvae (Ref. 12693). Air breather and bubble nest builder. Used in behavioral studies (Ref. 4537). Males will fight each other. The many colorful varieties are popular aquarium fish, however, the holding of the males in very small containers should be discouraged (Ref. 1672). Aquarium keeping: sexes should be kept separate unless for mating, and that only one female should be brought into the breeding tank measuring about 20-30 L (
IUCN Red List Status: Vulnerable (VU); Date assessed: 25 February 2011 (A2ace) Ref. (126983)
Threat to humans:  harmless

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