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.
Layers of the Pelagic Zone. The pelagic zone is an enormous column of water that extends from the surface to the bottom of the world's oceans, away from the shore. It can be divided into several layers, which differ in amount of light, temperature, pressure and dissolved oxygen.he organisms that make their home in the pelagic zone can be divide into three types, phytoplankton, zooplankton and nekton. Phytoplankton-these primary producers are the basis of the ocean's food chain.