The trout-perches, pirate perch, and cave fishes is a small group of small, North America, freshwater fish. There are 9 species in 3 families: 1 pirate perch, 2 trout-perches, and 6 species of North American cave fishes. The cave fishes are particularly fascinating, they have all become blind and eyeless, as they cannot see in their utterly dark cave environments.
Tanya Dewey (author), Animal Diversity Web.
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends.
uses smells or other chemicals to communicate
having the capacity to move from one place to another.
specialized for swimming
uses touch to communicate