He rauropi mōkitokito, e noho ana i te kārewa o te wai tai me te wai māori. He tino kai tēnei ki ētahi atu rauropi huhua e noho ana i te wai. E rua ngā momo meroiti, ko te meroiti tipu me te meroiti ika. Ka haere te tukanga ahotakakame i roto i te meroiti tipu hei whakaputa pūngao mōna. Ko te nuinga o ngā meroiti ika he mawhiti, he pūhouhou ika rānei.
Small microscopic organisms which live in fresh or salt water. They constitute an important source of food for larger water-dwelling organisms. There are two main types of plankton called phytoplankton and zooplankton. Photosynthesis is carried out in phytoplankton to produce food. Most zooplankton consist of crustaceans and fish larvae.