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Betta raja Tan & Ng, 2005 |
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photo by
Wickham, M. |
| Family: | Osphronemidae (Gouramies), subfamily: Macropodusinae | |||
| Max. size: | 6.38 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | Asia: Sumatra, Indonesia. | |||
| Diagnosis: | Dorsal spines (total): 1-2; Dorsal soft rays (total): 7-10; Anal spines: 2-2; Anal soft rays: 23-26; Vertebrae: 28-30. Pelvic fin very long in mature males (15-23 anal fin rays at pelvic fin end, even exceeding anal-fin base in some specimens); anal fin and lower half of caudal fin with dark margins; anal fin rays 25-28 (mode 26); lateral scales 30-32 (mode 31); head length 33.9-37.4% SL; predorsal length 20.0-24.6% SL; preanal length 46.1-52.4% SL; and body length 62.8-70.7% SL (Ref. 56386). | |||
| Biology: | Inhabits lowland swamp forests (Ref. 56386). | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 05 January 2019 Ref. (130435) | |||
| Threat to humans: | harmless | |||