Are sponges plankton nekton benthos

Answer 1

Different species of jellyfish have different innate buoyancies, so when they are not swimming, some hang neutrally in the water, while others slowly sink when passive; a few float. Although a few of the largest jellyfish are strong swimmers, jellyfish are subject to the oceans currents, tides and waves for their large-scale movements. Animals in the sea whose movements are determined by these oceans currents are called plankton. In contrast, fish, marine mammals, squid, and a few other strong swimmers who can move beyond where natural ocean forces carry them are called nekton.

From another source: Marine animals are divided into three groups: zooplankton, nekton, and benthos. Zooplankton are drifting animals and are usually small, however, they can grow to fairly large size. For example, the jellyfish and the Portuguese man-of-war are examples of larger types of zooplankton which are unable to propel themselves effectively and are therefore at the mercy of either wind or current. The zooplanktonpopulation also includes some temporary members such as fish eggs or larval forms of organisms which may grow up and leave the planktonic community to join the nekton or benthos. Nekton are the free swimmers and probably the largest portion of familiar animals found in the ocean belong to this class. Common fishes, the octopus, whales, eels and squid are all examples of nekton. The nekton category includes a number of very diverse creatures. The whale, dolphin and porpoise are certainly very different from codfish or trout because whales represent sea mammals whereas cod are true fishes

Answer 2

they are benthos

Answer 3

squids are nekton not bentos or plankton