darter

noun

1. a person or thing that darts or moves swiftly.
2. anhinga.
3. any of several small, darting, freshwater fishes of the perch family, inhabiting streams of eastern North America.

noun

1. Also called: anhinga, snakebird any aquatic bird of the genus Anhinga and family Anhingidae, of tropical and subtropical inland waters, having a long slender neck and bill: order Pelecaniformes (pelicans, cormorants, etc)
2. any small brightly coloured North American freshwater fish of the genus Etheostoma and related genera: family Percidae (perches)