Health Tip 4: Aquariums Can Make You Sick

Fish, toads, frogs and other sea creatures may be fun to keep in your home, but they can make some people sick.

A germ called mycobacterium -- often present in aquarium water -- can cause illness among people with weak immune systems, such as those who have AIDS, the U.S. Centers for Disease Control and Prevention says.

Very young children, the elderly and people with other chronic illnesses may also be susceptible, the CDC says.