noun
- a small, brightly colored tropical freshwater fish often kept in aquariums
Examples
- The neon tetras swam in a school around the aquarium.
- She added six cardinal tetras to her fish tank.
- Tetras are popular among beginner aquarium enthusiasts.
- The pet store had several varieties of tetras for sale.
- These tetras prefer soft, slightly acidic water.
- The bright colors of the tetras made the aquarium beautiful.