Darter

n.
  1. One who darts, or who throw darts; that which darts.
  2. (Zoöl.) The snakebird, a water bird of the genus Plotus; -- so called because it darts out its long, snakelike neck at its prey. See Snakebird.
  3. (Zoöl.) A small fresh-water etheostomoid fish. The group includes numerous genera and species, all of them American. See Etheostomoid.