The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos (σκύφος), …

Mar 29, 2026 · There are approximately 200 species of Scyphozoans organized into four orders. Familiar scyphozoans include Aurelia (the moon jelly) and Cyanea (the lion's mane jelly). …

Class Scyphozoa Exclusively marine group in which acraspedote medusae predominate. Life histories commonly involve alternation of a very small polyp, the scyphistoma, with a medusa, which develops …

May 21, 2009 · Scyphozoa is defined as a class of large, solitary marine invertebrates commonly known as true jellyfish, characterized by their inverted bell-shaped morphology and ability to inhabit various …

Jul 14, 2026 · Jellyfish, any planktonic marine member of the class Scyphozoa (phylum Cnidaria), a group of invertebrate animals composed of about 200 described species, or of the class Cubozoa …

Most scyphozoan jellyfish are pelagic, free-swimming forms of the open ocean. Some small species are planktonic, and one order, the Stauromedusae, are sessile on the ocean floor. All scyphozoa are …

Scyphozoans (the "true jellyfish") are exclusively marine, but some hydrozoans with a similar appearance live in fresh water. Large, often colorful, jellyfish are common in coastal zones worldwide.

Class Scyphozoa, an exclusively marine class of animals with about 200 known species, includes all the jellies. The defining characteristic of this class is that the medusa is the prominent stage in the life …

The class Scyphozoa comprises the familiar jellyfishes, of major ecological significance in the plankton. Some, including the sessile stauromedusae and the polyp stages of metagenetic free-swimming …

WoRMS taxon details Scyphozoa AphiaID 135220 (urn:lsid:marinespecies.org:taxname:135220) Classification