Siamese Fighting Fish
Betta splendens · Fish, Vertebrate, Cold-blooded, Domesticated (captive-bred varieties)
Animal Family
Osphronemidae, order Anabantiformes, class Actinopterygii
Animal Category
Domestic Pet
Breed / Variety
Veiltail Betta
Conservation Status
Vulnerable in the wild due to habitat destruction, though billions exist in captivity as pets.
About This Creature
Small freshwater fish typically measuring 2 to 3 inches in length. This particular specimen is a vibrant royal blue color with elaborate, long-flowing fins characteristic of captive breeding. Wild forms are much duller with short fins.
Physical Characteristics
Streamlined body covered in iridescent scales, prominent upturned mouth for surface breathing, large dark eyes, and long flowing unpaired fins including a massive caudal fin, dorsal fin, and anal fin, alongside delicate pelvic fins.
Behavior & Temperament
Solitary and highly territorial, especially males towards other males. Diurnal activity patterns. Males flare their gills and fins as a threat display. Communicates via visual displays and color changes.
Habitat & Diet
Origin Region
Southeast Asia, specifically Thailand (formerly Siam), Cambodia, Laos, and Vietnam
Habitat
Freshwater (rice paddies, shallow ponds, slow-moving streams), Aquatic
Diet & Nutrition
Carnivore, feeding on insects, larvae, and zooplankton. Requires high-protein foods like bloodworms, brine shrimp, and specialized pellets.
Lifespan & Health
2 to 5 years in captivity. Prone to fin rot, dropsy, and ich if water quality is poor. Females produce eggs, males build bubble nests and care for fry.
Special Characteristics
Possesses a labyrinth organ allowing them to breathe atmospheric air directly from the water surface, enabling survival in low-oxygen, stagnant waters.
Ecological Information
Acts as a predator of mosquito larvae and other small aquatic insects, helping to control pest populations in their natural wetland habitats.