A pelagic longline consists of a mainline kept near the surface or at a certain depth by means of regularly spaced floats and with relatively long snoods with baited hooks, evenly spaced on the mainline. Pelagic longlines may be of considerable length. Some pelagic longlines are set vertically, each line hanging from a float at the surface. Pelagic longline cause large bycatches of sharks, turtles and seabirds.