Nekton include all animals that

Nekton refers to all aquatic animals that are able to swim freely and independently against currents. This group includes various species such as fish, marine mammals (like dolphins and whales), squid, and some reptiles (like sea turtles). Unlike plankton, which are mostly passive drifters, nekton are active swimmers and play essential roles in marine ecosystems as both predators and prey. Their ability to navigate through the water column allows them to occupy various ecological niches and contribute to the health of aquatic environments.