Is a dolphin a fish?
Even though they live in the ocean all of the time, dolphins are mammals, not fish. Also, dolphins are different than "dolphinfish," which are also known as mahi-mahi. Like every mammal, dolphins are warm blooded. Unlike fish, who breathe through gills, dolphins breathe air using lungs.
Are dolphins dangerous?
More widely, scientists and Federal officials worry about dolphins' injuring or even killing humans, especially given the rise in watching, feeding and swimming programs. ''Wildlife can be dangerous,'' said Trevor R. Spradlin, a Federal dolphin expert. ''But people see marine mammals differently, particularly dolphins.