Zooplankton are tiny organisms that cannot move of their own accord but float with currents. Here are some common zooplankton:
1. Seaweed: Seaweed is a type of plant plankton that is distributed in oceans around the world. Some species can also grow in fresh water.
2. Nocturnal algae: Nocturnal algae are a type of single-celled plankton. They are usually spherical or oval in shape, ranging in size from a few microns to several millimeters.
3. Phytoplankton: including diatoms, dinoflagellates, cyanobacteria, etc. They usually rely on photosynthesis to survive and are an important link in the aquatic food chain.
4. Jellyfish: Jellyfish are a type of transparent zooplankton with bell- or umbrella-shaped bodies and tentacles.
5. Small crustaceans: including planktonic shrimps, planktonic crabs, etc., they are usually only a few millimeters in size, but they are one of the most abundant biological communities in the marine ecosystem.
6. Sea squirts: Sea squirts are a type of porous animals. They are small in size but extremely large in number. They are a very important biological component in the ocean.
In summary, zooplankton play an important role in both oceans and freshwaters. They provide an important food source for ecosystems and have an impact on the environment and oxygen circulation.
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