Acronym for Oceanographic Remotely Controlled Automaton, a diesel powered semi-submersible designed to survey water depths from 10 to 300 meters This instrument was designed for the cost effective collection of hydrographic and oceanographic data See the ORCA Web site
predatory black-and-white toothed whale with large dorsal fin; common in cold seas
A black and white whale that hunts in packs; also called the killer whale Orcas are actually the largest member of the dolphin family