Giant Betta

Betta splendens 'Giant'

Animalia›Chordata›Actinopterygii›Osphronemidae

Variety of Halfmoon Betta · giant

📍 Southeast Asia (cultivar)

The Giant Betta is a selectively bred line of Betta splendens that can reach 12–14 cm (4.7–5.5 in) in length — roughly twice the size of standard bettas. Despite their size, they require the same care as regular bettas but demand more space and food. The giant gene is recessive and was developed in Thailand through multi-generation line breeding.

Size5"

Min Tank10g

semi-aggressive

Zonetop

Care Guide

Diet

Giant Bettas are strict carnivores requiring high-protein foods. Feed large betta pellets, earthworms, and large frozen bloodworms once daily, adjusting portions to avoid overfeeding. Occasional live foods like mosquito larvae enhance natural feeding behavior and nutrition.

Behavior

Giant Bettas are semi-aggressive surface dwellers that spend most time near the water's top. Males are highly territorial and will attack other males on sight; females can be aggressive toward conspecifics outside breeding. They are intelligent, interactive fish that recognize their keeper and respond to feeding cues.

Breeding

Breeding Giant Bettas in captivity is difficult and requires careful conditioning of both sexes. Males build bubble nests and must be introduced to receptive females in controlled conditions; aggression between pairs is common. Fry are tiny and require infusoria and micro foods for the first weeks, making large-scale breeding impractical for most hobbyists.

Tank Mates

Otocinclus

Peaceful bottom-dweller that avoids the betta's top-zone territory; requires 20+ gallon tank minimum

good

Ramshorn Snail

Slow-moving snail unlikely to trigger aggression; helps with algae control

good

Nerite Snail

Hardy snail with hard shell; occupies different zones and poses no threat to the betta

good

Bristlenose Pleco

Nocturnal bottom-feeder; may compete for food but generally ignores bettas if tank is 20+ gallons

caution

Common Diseases

Fin Rot

Symptoms

Frayed, discolored, or deteriorating fin edges; lethargy and loss of appetite

Treatment

Perform 25-50% water changes every 2-3 days, maintain pristine water quality, and treat with aquarium salt (1 tsp per gallon) or antibacterial medication if severe

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots on body and fins, excessive scratching against surfaces, rapid breathing

Treatment

Raise temperature to 28-30°C, perform daily water changes, and treat with ich medication or aquarium salt; quarantine if possible

Velvet Disease

Symptoms

Fine gold or rust-colored dust on body, clamped fins, lethargy, difficulty breathing

Treatment

Increase aeration, raise temperature to 28-30°C, reduce light exposure, and treat with copper-based medication or salt; quarantine immediately

Popeye

Symptoms

One or both eyes bulging outward, cloudiness, loss of appetite

Treatment

Perform large water changes to improve water quality, treat with antibacterial medication, and ensure proper nutrition; may indicate poor tank conditions