EVERYDAY SCIENCE

Detailed explanation-1: -The Scyphozoa are an exclusively marine class of the phylum Cnidaria, referred to as the true jellyfish (or “true jellies").

Detailed explanation-2: -All these characteristics are of marine class Scyphozoa of the phylum Cnidaria. Option A: Scyphozoa is the correct option. A true jellyfish of Scyphozoa class has two layers the outer epidermis and the inner gastrodermis whereas the fake jellyfish is composed of many organisms called polyps.

Detailed explanation-3: -So, the correct answer is ‘Jellyfish’.

Detailed explanation-4: -Scyphozoa. Scyphozoa are the most familiar jellyfishes, including most of the bigger and more colorful jellies that interact with humans, and are sometimes called “true jellyfish” for this reason. Scyphozoans are most often noticed in their medusa body form, and there are at least 200 species.

Detailed explanation-5: -Familiar scyphozoans include Aurelia (the moon jelly) and Cyanea (the lion’s mane jelly). Scyphozoans live in all oceans, from the Arctic to tropical waters. Some inhabit the deep sea, but most live near the coastal waters. Most are motile animals, but members of the order Stauromedusae are sessile.