Plankton

Science / Marine Biology / Plankton: Pelagic organisms that float through the water column, not attached to any substrate and unable to move against the currents and tides. Plankton can be further divided into phytoplankton and zooplankton, meroplankton and holoplankton. Compare nekton.

Ultraplankton

Science / Marine Biology / Ultraplankton: Planktonic organisms that are less than 2 micrometers in size MORE

Phytoplankton

Science / Biology / Phytoplankton: A fioating layer of photosynthetic organisms, including algae, that are an important source of atmospheric oxygen and form the base of the aquatic food chain. MORE

Megaplankton

Science / Marine Biology / Megaplankton: Planktonic organisms that are greater than or equal to 2000 micrometers in size MORE

Meroplankton

Science / Marine Biology / Meroplankton: Organisms that spend part of their time in the plankton but also spend time in the benthos (e.g., planktonic larvae of benthic invertebrates) MORE

Zooplankton

Science / Marine Biology / Zooplankton: Animal members of the plankton MORE

Nanoplankton

Science / Marine Biology / Nanoplankton: Planktonic organisms that are 2-20 micometers in size. MORE

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