Spotfin betta (Betta macrostoma)

Scientific name: Betta macrostoma Regan, 1910

The Spotfin betta (Betta macrostoma) is a freshwater fish of the family Osphronemidae. In the aquarium it needs water at 24–26°C (75–79°F). Native range: Asia, Borneo.

Spotfin betta care at a glance

Temperature: 24–26°C (75–79°F)

Biology

Dorsal spines (total): 0 - 1; Dorsal soft rays (total): 9-11; Anal spines: 0 - 1; Anal soft rays: 24 - 27; Vertebrae: 31 - 32. Differs from other member of the Betta unimaculata group by possessing the following combination of characters: dorsal fin ocellus; body red in color; caudal fin with transverse black and red bands; opercle with large red blotch in mature male; vertebrae 31-32 (mode 32); dorsal-fin rays 9-11 (mode 10); anal-fin rays 25-28 (mode 27); pectoral-fin rays 13-14; lateral scales 32-33 (mode 33); subdorsal scales 6-8 (mode 7); predorsal scales 21-24 (mode 23); predorsal length 62.3-66.7% SL; head length 30.4-33.3% SL; anal-fin base length 43.2-49.2% SL; dorsal-fin base length 12.2-15.7% SL; lower jaw length 38.0-54.0% HL.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name: Betta macrostoma
Family: Osphronemidae (Gouramies)
Order: Perciformes (Perch-like fish)
Class: Actinopterygii (Ray-finned fishes)
Maximum length: 6.7
Environment: Freshwater;; pH range: 4.4 - 5.7; dH range: ? - 10 benthopelagic
Climate: Tropical
Distribution: Asia: Borneo.
Conservation status (IUCN): Vulnerable (VU) (D2)
Threat to humans: Harmless
Uses: Aquarium: commercial
Resilience: High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)