The sea is full of countless tiny, free-floating organisms, known as plankton (from the Greek word πλαγκτός, or planktos, meaning wanderer), which are absolutely vital for the functioning of marine ecosystems around the world. These organisms include phytoplankton, microscopic bacteria and algae that convert the sun’s energy into food via photosynthesis, and zooplankton, small animals that feed on other plankton. Some of the eggs and larvae of larger marine organisms, such as fish and crustaceans, are also classed as zooplankton. Hundreds of zooplankton, measuring a fraction of a millimetre in size, can be found in a single cubic metre of seawater. As well as being an important means by which the juvenile forms of many animals may disperse over large distances during their development into adults, zooplankton are a key food source for larger animals, supporting the entire marine food web. For example, flying fish, which eat mostly plankton, are an important part of the diet of large predatory fish and seabirds. Even some of the largest fish species in the world, such as manta rays and whale sharks, are planktivorous, feeding almost exclusively on plankton.
Release Date: 06th December 2017
Stamp Size: 28 x 42mm
Sheet Format: 10