Pelagic: technical : relating to or living in the sea far from the shorePelagic comes to us from Greek, via Latin. The Greek word pelagikos became "pelagicus" in Latin and then "pelagic" in English. ("Pelagikos" is derived from "pelagos," the Greek word for "sea," plus the adjectival suffix -ikos.) "Pelagic" first showed up in dictionaries in 1656; a definition from that time says that Pelagick meant "of the Sea, or that liveth in the Sea." A full 350 years later, writers are still using "pelagic" with the same meaning, albeit less frequently than its more familiar synonym "oceanic." Examples of Pelagic in a Sentence: among pelagic animals the undisputed king is the blue whale, the largest creature currently roaming the face of the earth at one time pelagic whaling was the cornerstone of the island's economy Pelagic fish live in the pelagic zone of ocean or lake waters – being neither close to the bottom nor near the shore – in contrast with demersal fish that do live on or near the bottom, and reef fish that are associated with coral reefs. The marine pelagic environment is the largest aquatic habitat on Earth, occupying 1,370 million cubic kilometres (330 million cubic miles), and is the habitat for 11% of known fish species. The oceans have a mean depth of 4000 metres. About 98% of the total water volume is below 100 metres (330 ft), and 75% is below 1,000 metres (3,300 ft). Pelagic fish range in size from small coastal forage fish, such as herrings and sardines, to large apex predator oceanic fishes, such as bluefin tuna and oceanic sharks. They are usually agile swimmers with streamlined bodies, capable of sustained cruising on long-distance migrations. Many pelagic fish swim in schools weighing hundreds of tonnes. Others are solitary, such as the large ocean sunfish weighing more than 500 kilograms, which sometimes drift passively with ocean currents, eating jellyfish.