A new study published in the Journal of Animal Welfare challenges traditional beliefs about housing Siamese fighting fish (Betta splendens). These vibrant and captivating creatures are often kept in aquariums far smaller than necessary, which can negatively affect their behavior and overall well-being.
How Does Tank Size Affect Fish?
The study found that bettas housed in larger aquariums displayed more natural and active behavior.
Fish in 19.3-liter (5-gallon) tanks swam significantly more than those in small 1.5-liter (0.4-gallon) containers.
Decorated tanks with plants, gravel, and hiding spots encouraged more natural behaviors.
Fish in small, empty containers often showed repetitive movements and excessive interaction with tank walls, signs of stress or boredom.
Recommended Tank Conditions
Minimum temporary housing size (e.g., in pet stores) should be at least 5.6 liters (1.5 gallons).
For home aquariums, a minimum of 10 liters (2.5 gallons) is strongly recommended, but bigger is always better.
Tanks should be wider rather than taller, as bettas prefer horizontal swimming space.
Live plants, gravel, and hiding spots help recreate a natural environment and reduce stress.
Rethinking Betta Care Standards
Researchers hope their findings will change how bettas are housed, urging pet stores, aquarium owners, fish keepers, and policymakers to prioritize the species' well-being.
This research highlights a crucial point: even small creatures deserve respect and proper care that aligns with their natural needs.