The Fishing Spider is a common name used for the spiders species in the genus Dolomedes, family Pisauridae. They are known by a number of common names including fishing spiders, raft spiders, dock spiders or wharf spiders. They are generally dark-colored, usually brownish or grayish, with white markings. Almost all species of Fishing Spiders are semi-aquatic. Fishing spiders can run across water and can dive underneath to capture prey. In addition to insects, fishing spiders can also catch small fish and tadpoles.