EVERYDAY SCIENCE

Detailed explanation-1: -“Corals, anemones, things we call hydroids, sea pens, and jellyfish, ” lists Dr. Ames. They all belong to the phylum Cnidaria (pronounced ny – DARE – ee-a). A phylum is one of the large groupings used in taxonomical classification to refer to a group of creatures that has evolved from a common ancestor.

Detailed explanation-2: -Class Scyphozoa-true jellyfish.

Detailed explanation-3: -Cnidarians have two body forms-polyp and medusa-which often occur within the life cycle of a single cnidarian. The body of a medusa, commonly called a jellyfish, usually has the shape of a bell or an umbrella, with tentacles hanging downward at the margin.

Detailed explanation-4: -Cnidaria – Common Names Cnidarians are radially symmetrical, soft-bodied animals found in aquatic habitats. Their common names are sea anemones, jellyfish, corals and hydras. Some other cnidarians include Portuguese men-of-war, sea fans, sea pens and sea whips.