Scarlet Betta
Betta coccina
Scarlet Betta (Betta coccina) — Intermediate care, Semi-aggressive, under Betta. Minimum tank in the app: 10.6 US gal min; aim for 72–86°F and pH 6–7.5. The Scarlet Betta is an intriguing choice for aquarists who appreciate individualistic fish with vibrant coloration and unique personalities.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Southeast Asia
- East & Southeast Asia
Regional colours match the stocking calculator’s origin map.
Scarlet Betta Tank Setup
Create a balanced environment that includes both open swimming spaces and dense plant cover. Use soft substrates to minimize stress during movement and ensure gentle water flow to mimic their natural mid-water habitat. Adequate lighting can enhance their colours, but avoid overly bright conditions that might induce stress.
What Do Scarlet Bettas Eat?
Scarlet Bettas are omnivorous and may compete for food if offered in a fast-paced manner. To reduce competition, provide a varied diet including high-quality pellets, frozen, and live foods, ensuring that feeding times are calm and controlled to allow them to flourish without stress.
Scarlet Betta Tank Mates
Ideal companions include similarly sized and semi-aggressive species that occupy different tank levels, such as certain rasboras or tetras. Avoid fin-nipping species or overly aggressive fish that could provoke territorial disputes. Intraspecies interactions are best managed in isolation, as multiple Scarlet Bettas can lead to conflict unless ample space and visual barriers are provided.
Are Scarlet Bettas Good for Beginners?
We rate this as intermediate. Budget time for testing, maintenance, and watching behaviour if the water looks fine but the fish do not. A common error is underestimating their need for space and cover, leading to increased aggression and stress. introducing them to overly boisterous or larger fish can result in undue stress or injury.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




