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FishbeginnerFreshwater

Elephant Ear Betta

Betta splendens 'Dumbo'

AnimaliaChordataActinopterygiiOsphronemidae

Variety of Halfmoon Betta · elephant ear

📍 Southeast Asia (cultivar)

Ask Finn

The Elephant Ear or Dumbo Betta has extraordinarily large, ruffled pectoral fins resembling elephant ears. This genetic variant can occur in any tail-type betta and is bred specifically for the oversized pectoral fins rather than the caudal shape. The large pectorals are used for slow, graceful swimming and give the fish an unmistakable, dramatic appearance.

Size2.5"
Min Tank5g
semi-aggressive
Zonetop

Care Guide

Diet

Elephant Ear Bettas are strict carnivores and should be fed high-quality betta pellets as their staple diet, supplemented 2-3 times weekly with frozen or live foods such as bloodworms, daphnia, or 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.

Behavior

This cultivar is semi-aggressive and highly territorial toward other males, but displays graceful, deliberate swimming patterns due to their oversized pectoral fins. They are surface-dwelling fish that spend much of their time near the top of the tank, often flaring their elaborate fins as a display of dominance or courtship. Males are solitary and should never be housed together; females may tolerate limited community settings but require careful monitoring.

Breeding

Breeding Elephant Ear Bettas in captivity is moderately difficult and requires specific conditioning, a separate breeding tank (10+ gallons), and careful pairing of compatible individuals. Males build bubble nests and will guard fry aggressively; females must be removed after spawning to prevent aggression. Fry are tiny and require infusoria or liquid fry food for the first week before graduating to micro pellets.

Common Diseases

Fin Rot

Symptoms

Frayed, discolored, or deteriorating fin edges; may appear white or black at margins

Treatment

Perform 25% water changes every 2-3 days, maintain pristine water quality, and consider antibacterial medication (e.g., Maracyn) if condition worsens

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots resembling salt grains on body and fins; lethargy and rubbing against objects

Treatment

Raise temperature to 28-30°C, perform daily 25% water changes, and treat with ich medication or salt baths; quarantine if possible

Velvet Disease

Symptoms

Fine golden or rust-colored dust on body, clamped fins, rapid gill movement, lethargy

Treatment

Increase aeration, raise temperature to 28°C, dim lighting, and treat with copper-based medication or salt; quarantine immediately

Dropsy

Symptoms

Swollen abdomen, scales standing out like a pinecone, lethargy, loss of appetite

Treatment

Isolate in a hospital tank, perform frequent water changes, feed high-quality foods, and treat with antibiotics if bacterial; prognosis is often poor

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Quick Facts

diet
Carnivore – betta pellets, bloodworms, daphnia
lifespan
2–4 years
max size
7 cm (2.75 in)
tank size
5 gallons minimum
temperament
Aggressive toward male conspecifics

Water it likes

ph
6.5–7.5
ammonia
0 ppm
nitrate
<20 ppm
hardness
2–12 dGH
temperature
75–86°F (24–30°C)

Stats

Community tips0
Kept by0 hobbyists