They also have a brain. Earthworms are important deposit feeders that help form and enrich soil. Leeches are either predators or parasites. Parasitic leeches feed  ...


The annelids also known as the ringed worms or segmented worms, are a large phylum, with ... Marine species are mostly blood-sucking parasites, mainly on fish , while most freshwater species are predators. They have suckers at both ends ...


Flatworms live on land, in fresh water, in the ocean, and in or on other animals as parasites (e.g., tapeworms). Parasitic flatworms that live on or inside other ...


The latter are fish parasites. The second important ecosystem service is their role in the food web. Annelids can often be abundant and are an important food ...


Annelid, any member of a phylum of invertebrate animals that are characterized ... or parasitic on other organisms—e.g., all marine leeches are parasitic on fish.


Most annelids are free-living, although several species have parasitic, mutualistic , or commensal relationships with other animals, and many species are ...


... phylum show parasitic and commensal symbioses with other species in their habitat. Approximately 16,500 species have been described in phylum Annelida.


There are three classes of annelids. Note that you should look up the definition of parasite, to feel sure that you got this right. Note also that parasites need not be ...


The parasitic nematodes attack virtually all groups of animals and plants. Hookworm and trichinosis are parasites that causes serious infections in humans .


The annelids (from Latin anellus "little ring") are a large phylum (Annelida) of ... ( such as the polychaetes), as well as some which are parasitic or mutualistic.