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Krill belong to the large arthropod subphylum, the Crustacea. The most familiar and largest group of crustaceans, the class Malacostraca, includes the superorder Eucarida comprising the three orders, Euphausiacea (krill), Decapoda (shrimp, prawns, lobsters, crabs), and the planktonic Amphionidacea. The order Euphausiacea comprises two families.
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 February 2025. Organisms living in water or air that are drifters on the current or wind This article is about the marine organisms. For other uses, see Plankton (disambiguation). Marine microplankton and mesoplankton Part of the contents of one dip of a hand net. The image contains diverse planktonic ...
Some larger jellyfish are considered planktonic. Plankton are the building blocks of life in the sea. Everything depends on them. ... Some of the largest plankton are krill and feed the largest of ...
Planktonic copepods are important to global ecology and the carbon cycle. They are usually the dominant members of the zooplankton , and are major food organisms for small fish such as the dragonet , banded killifish , Alaska pollock , and other crustaceans such as krill in the ocean and in fresh water.
Examples of holoplankton include some diatoms, radiolarians, some dinoflagellates, foraminifera, amphipods, krill, copepods, and salps, as well as some gastropod mollusk species. Holoplankton dwell in the pelagic zone as opposed to the benthic zone. [2] Holoplankton include both phytoplankton and zooplankton and vary in size.
Other particularly important groups of zooplankton are the copepods and krill. Copepods are a group of small crustaceans found in ocean and freshwater habitats. They are the biggest source of protein in the sea, [24] and are important prey for forage fish. Krill constitute the next biggest source of protein. Krill are particularly large ...
krill, "planktonic crustaceans and their larvae (order or suborder Euphausiacea and especially genus Euphausia) that constitute the principal food of baleen whales" [13] lemming , "any of various small short-tailed furry-footed rodents (such as genera Lemmus and Dicrostonyx) of circumpolar distribution that are notable for population ...
Antarctic krill (Euphausia superba) is a species of krill found in the Antarctic waters of the Southern Ocean. It is a small, swimming crustacean that lives in large schools, called swarms , sometimes reaching densities of 10,000–30,000 animals per cubic metre. [ 3 ]