Pelagic fish
Videos
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 live on or near the bottom, and reef fish that are associated with coral reefs.
A school of large pelagic predator fish (bluefin trevally) sizing up a school of small pelagic prey fish (anchovies)
Large epipelagic predator fish, such as this Atlantic bluefin tuna, have a deeply forked tail and a smooth body shaped like a spindle tapered at both ends and countershaded with silvery colours.
Drifting Sargassum seaweed provides food and shelter for small epipelagic fish. The small round spheres are floats filled with carbon dioxide which provide buoyancy to the algae.
Great barracuda accompanied by a school of jacks
Tuna
Videos
A tuna is a saltwater fish that belongs to the tribe Thunnini, a subgrouping of the Scombridae (mackerel) family. The Thunnini comprise 15 species across five genera, the sizes of which vary greatly, ranging from the bullet tuna up to the Atlantic bluefin tuna, which averages 2 m (6.6 ft) and is believed to live up to 50 years.
Tuna being weighed on Greek quay-side
Tuna at Tsukiji fish market, Tokyo
Tuna cut in half for processing at Tsukuji fish market