Galaxy Koi Betta

Betta splendens 'Galaxy Koi'

Animalia›Chordata›Actinopterygii›Osphronemidae

Variety of Halfmoon Betta · galaxy koi

📍 Southeast Asia (cultivar)

Galaxy Koi Bettas are among the most visually complex cultivars, displaying a mosaic of multi-coloured patches — white, orange, black, and metallic blue or green — resembling the marbled pattern of koi fish. The galaxy pattern refers to an additional iridescent metallic sheen overlaid on the koi marbling. Each fish is unique; no two Galaxy Koi Bettas look exactly the same.

Size2.5"

Min Tank5g

semi-aggressive

Zonetop

Care Guide

Diet

Galaxy Koi Bettas are strict carnivores and should be fed high-quality betta pellets as their staple diet, supplemented 2-3 times weekly with frozen bloodworms or live brine shrimp. Feed small portions once daily, only what they can consume in 2-3 minutes, as overfeeding leads to bloating and poor water quality in small tanks.

Behavior

Galaxy Koi Bettas are semi-aggressive surface dwellers that spend most of their time near the water's surface. Males are highly territorial and will attack other males on sight, but can sometimes tolerate peaceful community fish if the tank is large enough and heavily planted. They are curious and interactive with their owners, often flaring and displaying their unique marbled patterns.

Breeding

Breeding Galaxy Koi Bettas in captivity is moderately difficult and requires careful conditioning of both male and female in separate tanks. Males build bubble nests and will guard fry aggressively; females must be removed after spawning to prevent aggression. Expect 50-300 fry per spawn, though raising them requires significant space and frequent water changes.

Tank Mates

Otocinclus

Peaceful bottom-dweller that won't compete for food or space; ignores betta displays

good

Ramshorn Snail

Slow-moving and non-threatening; bettas rarely attack snails; helps with algae control

good

Emerald Dwarf Rasbora

Small, fast-moving schoolers that may trigger aggression; only in heavily planted 10+ gallon tanks

caution

Dwarf Gourami

Similar temperament and labyrinth breathing may cause conflict; requires ample space and hiding spots

caution

Nerite Snail

Armored and unpalatable; excellent algae eater that coexists peacefully with bettas

excellent

Common Diseases

Fin Rot

Symptoms

Fraying, discoloration, or deterioration of fins; often starts at edges and progresses inward

Treatment

Perform 25-50% water changes every 2-3 days, maintain pristine water quality, and consider antibacterial medication (e.g., Maracyn) if severe; isolate if in community tank

Ich (White Spot Disease)

Symptoms

Small white spots on body and fins, rapid breathing, lethargy, and rubbing against objects

Treatment

Raise temperature gradually to 28-30°C, perform daily water changes, and treat with ich medication; quarantine affected fish to prevent spread

Velvet Disease

Symptoms

Fine golden or rust-colored dust on body, rapid gill movement, clamped fins, and loss of appetite

Treatment

Darken the tank, raise temperature to 28-30°C, and treat with copper-based medication or salt baths; isolate immediately as it spreads rapidly

Dropsy

Symptoms

Swollen abdomen, pinecone-like scales, lethargy, and loss of appetite

Treatment

Isolate immediately, perform frequent water changes, and treat with antibiotics; prognosis is poor, but improving water quality and reducing stress may help