tropical fish

例句：

1. 1. Tropical fish are popular in many aquariums.
   热带鱼在许多水族馆都很受欢迎。
2. 2.The tropical fish in the tank were all swimming around happily.
   鱼缸里的热带鱼都在快乐地游来游去。
3. 3.The tropical fish are often kept in large tanks for their beauty and health.
   热带鱼通常被养在大型水箱中，因为它们的美丽和健康。