https://www.britannica.com/animal/annelid

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

https://en.wikipedia.org/wiki/Annelid

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 ...

https://www.encyclopedia.com/plants-and-animals/animals/zoology-invertebrates/annelida

This class includes the 500 species of leeches, flattened, predacious or parasitic annelids equipped with suckers used for creeping. Leeches range in length ...

https://www.sciencedirect.com/topics/earth-and-planetary-sciences/annelid

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 ...

https://manoa.hawaii.edu/exploringourfluidearth/biological/invertebrates/worms-phyla-platyhelmintes-nematoda-and-annelida

Segmented worms (phylum Annelida) are the most complex animals with worm- like body ... Parasitic flatworms that live on or inside other animals—including ...

https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_Introductory_Biology_(CK-12)/11%3A_Invertebrates/11.9%3A_Annelids

Annelids. The phylum Annelida is made up of segmented worms such as earthworms. ... or parasites. Parasitic leeches feed off the blood of vertebrate hosts.

https://www.ck12.org/biology/annelid-ecology/lesson/Annelid-Ecology-Advanced-BIO-ADV/

Dec 11, 2015 ... Describes the ecology of different annelids. ... and Hirudinea all include marine, freshwater, and terrestrial species as well as parasitic species.

https://www.cdc.gov/parasites/about.html

There are three main classes of parasites that can cause disease in humans: ... consider the helminths to also include the segmented worms (annelids)—the ...

https://www.ck12.org/book/CK-12-Biology-Concepts/section/11.9/

Sep 4, 2016 ... Discusses characteristics of annelids like earthworms. ... either predators or parasites. Parasitic leeches feed off the blood of vertebrate hosts.

http://tolweb.org/accessory/Characteristics_of_Annelida?acc_id=57

Annelids are all bilaterally symmetrical animals. They range in size from much less than 1 mm in length to more than 3 m. The smallest annelids described to ...