The two most prominent types of plankton in the ocean are zooplankton, which are tiny animal organisms, and phytoplankton, which are plantlike. (Other forms of plankton include bacterial and fungal.

As plankton is a collection of different types of organisms it also varies both in appearance and size. They can be microscopic and as small as 2 micrometres. That means that it’s impossible to ...

Warmer waters generally have lower plankton biomass and abundance, and consist of species with smaller body sizes. Jellyfish, my favorite type of zooplankton, are among the biggest plankton.

This has only been possible by taking consistent, long-term measurements of these types of plankton." More information: Abigail McQuatters-Gollop et al, The silent majority: Pico- and nanoplankton ...