What is a nekton and give an example?

A nekton is a group of aquatic organisms that are able to swim actively and independently of the ocean currents. Nekton are found in all oceans, from the surface waters to the deep sea. They include fish, squid, cuttlefish, and marine mammals.

Nekton play an important role in the marine ecosystem, as they are both predators and prey. They also play a role in nutrient cycling, as they transport nutrients from the surface waters to the deep sea.

One example of a nekton is the tuna. Tuna are a type of fish that are found in all oceans, except the Arctic Ocean. They are fast swimmers and can reach speeds of up to 75 miles per hour. Tuna are predators and feed on a variety of fish, squid, and crustaceans.