colloid. 1  a solid, liquid, or gaseous substance made up of very small, insoluble particles (as single large molecules or masses of smaller molecules) that remain in suspension in a surrounding solid, liquid, or gaseous medium of different matter.
Nekton. Nekton are the animals that can move by themselves in the ocean waters. Nekton live in all zones of the ocean. However, just like benthos and plankton, most live in the sunlight zone or shallow twilight zone since there is the most sunlight and it is easy to feed on smaller organisms such as krill and minnows.
Plankton consists of any drifting organism, such as animals, plants or bacteria. They inhabit the pelagic zone of oceans, seas, or any other bodies of fresh water. See related link below.. These are microscopic organisms, similar to phytoplankton, who consume other plankton and digest waste.hey inhabit the pelagic zone of oceans, seas, or any other bodies of fresh water. See related link below.. These are microscopic organisms, similar to phytoplankton, who consume other plankton and digest waste.