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Elephant Ear Betta
Betta splendens 'Dumbo'
Animalia›Chordata›Actinopterygii›Osphronemidae
Variety of Halfmoon Betta · elephant ear
📍 Southeast Asia (cultivar)
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.
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.
Tank Mates
Peaceful bottom-dweller that won't compete for food or territory; ignores bettas
Slow-moving and non-threatening; bettas rarely bother snails in 5+ gallon tanks
Small schooling fish; may trigger predatory response in some bettas, requires close observation
Docile catfish that occupies bottom zone; minimal interaction with surface-dwelling bettas
May be viewed as prey by aggressive individuals; best in larger tanks with plenty of cover
Common Diseases
Fin Rot
Frayed, discolored, or deteriorating fin edges; may appear white or black at margins
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)
White spots resembling salt grains on body and fins; lethargy and rubbing against objects
Raise temperature to 28-30°C, perform daily 25% water changes, and treat with ich medication or salt baths; quarantine if possible
Velvet Disease
Fine golden or rust-colored dust on body, clamped fins, rapid gill movement, lethargy
Increase aeration, raise temperature to 28°C, dim lighting, and treat with copper-based medication or salt; quarantine immediately
Dropsy
Swollen abdomen, scales standing out like a pinecone, lethargy, loss of appetite
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)