Larvae mature into polyps, which will then bud off and mature into young jellyfish.' An adult jellyfish is known as a medusa. Jellyfish belong to a group called Cnidaria, which also includes sea ...

These cnidarians are famous for their stinging abilities ... Katherine Wallis/ Shutterstock There are some 3,600 species of hydrozoans. These are typically smaller than scyphozoan jellyfish. The polyp ...

Hydractinia symbiolongicarpus is a member of the phylum Cnidaria, making it a close relative of jellyfish and corals. The animal’s tendency to form large colonies comes with problems, says study ...

Corals are members of the phylum Cnidaria, a diverse group that includes ... Corals are colonial organisms made up of individual polyps, each 1–3 mm in diameter, that are connected to one ...

Aa Aa Aa Corals reefs are communities of organisms in which corals (members of the phylum Cnidaria ... is estimated that about 25% of all marine species are found in coral reefs.