Tropical fish have a bright and attractive color to attract the attention of a partner or to frighten predators.
Tropical fish can adapt to different environments, such as fresh water, brackish water, or sea.
Some types of tropical fish can swim to very high speeds, such as marlin fish and sailfish fish.
Tropical fish can improve themselves if injured by regenerating tissue.
Some types of tropical fish, such as chef fish, can recognize their owners and can even be trained to do simple tricks.
Tropical fish can interact with humans by giving food or even asking for food by jumping out of water.
Some types of tropical fish, such as clown fish, can live in mutualism with other animals, such as sea anemones.
Tropical fish have a very efficient digestive system that they can use the nutrients of their food very well.
Tropical fish can produce sound by swiping bones in their heads.
Some types of tropical fish, such as piranha fish, have a bad reputation as a malignant meat eaters, but actually only a few types of piranha fish are truly aggressive towards humans.
