Definition that contains plankton
- krill shrimp-like planktonic crustaceans; major source of food for e.g. baleen whales
- manta extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
- devilfish extremely large pelagic tropical ray that feeds on plankton and small fishes; usually harmless but its size make it dangerous if harpooned
- anchovy small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide
- phytoplankton photosynthetic or plant constituent of plankton; mainly unicellular algae
- cyanobacteria predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll; occur singly or in colonies in diverse habitats; important as phytoplankton
- zooplankton animal constituent of plankton; mainly small crustaceans and fish larvae
- basking shark large harmless plankton-eating northern shark; often swims slowly or floats at the sea surface
- whalebone whale whale with plates of whalebone along the upper jaw for filtering plankton from the water
- order euphausiacea small commonly luminescent crustaceans; important element of marine plankton: krill