Pelagic fish live in the pelagic zone of ocean or lake water – not being close to the bottom nor near the shore. The marine pelagic environment is the largest aquatic habitat on Earth, occupying 1,370 million cubic kilometers (330 million cubic miles), and is the habitat for 11% of known fish species. Pelagic fish range in size from small coastal forage fish, such as herrings and sardines, to large apex predator oceanic fish, such as the southern bluefin tuna and oceanic sharks. They are usually agile swimmers with streamlined bodies, capable of sustained cruising on long distance migrations. Many of them swim in schools weighing hundreds of tonnes. Others are solitary, like the large ocean sunfish weighing over 500 kilograms, sometimes drifting passively with ocean currents, eating jellyfish.