Craspedacusta is not a true jellyfish; true jellyfish are exclusively marine in habit and belong to the class Scyphozoa (phylum Cnidaria). ... Phylum Cnidaria corals, sea anemones, jellyfish, and relatives. If you'd like to learn about how this jellyfish got its name or how it is related to other organisms, keep scrolling down! Finally, Anthozoa are corals and sea anemones. Members of the genus measure more than 100 mm (4 inches) in diameter. Jellyfish are found in all oceans across the world, from tropical waters to the cold waters of the Arctic ocean, and have existed on Earth for billions of years – since before the time of the dinosaurs! Craspedacusta sowerbyi, which is Hydras are hydrozoans. Cnidaria: information (1) Cnidaria: pictures (133) Cnidaria: specimens (7) Class … 'comb' and φέρω, pherō, 'to carry'; commonly known as comb jellies) comprise a phylum of invertebrate animals that live in marine waters worldwide. Jellyfish belong the phylum "Cnidaria" which is part of the kingdom "Animalia". Next, jellyfish belong to the Scyphozoa class. To this class of the Cnidaria phylum, belong approximately 50 species commonly known as stalked jellyfish or stauromedusa. Apart from the jellyfish, other species that belong to this phylum include corals, sea anemones, hydras, sea pansies, sea fans and sea whips. There are three main classes in the phylum. Ctenophora (/ t ɪ ˈ n ɒ f ər ə /; singular ctenophore, / ˈ t ɛ n ə f ɔːr / or / ˈ t iː n ə f ɔːr /; from Ancient Greek: κτείς, romanized: kteis, lit. Jellyfish is included in phylum Cnidaria, class Scyphozoa. The largest is the lion's mane jellyfish (Cyanea capillata), which can have a bell over six and a half feet in diameter and weigh up to 440 pounds; the smallest is the Irukandji jellyfish, several species of dangerous jellyfishes found in tropical waters, which measure only about two-tenths of an inch and weigh well under a tenth of an … The classification would be like: Kingdom Animalia Phylum Cnidaria Class Scyphozoa Science is always changing and evolving, and with that, the characteristics which define a class, order, family, etc. Freshwater jellyfish, any medusa, or free-swimming form, of the genus Craspedacusta, class Hydrozoa (phylum Cnidaria). Cnidaria: information (1) ... Phylum Cnidaria corals, sea anemones, jellyfish, and relatives. Medusozoa comes from the Ancient Greek Μέδουσα, which comes from the word for “rule over” (μέδω). Classification . They are flattish, with four to six flat, short-sided branches projecting from both sides of the mouth, or oral, arms. There are over 11,000 Cnidarian species. The first class is Hydrozoa. The word 'Cnidaria' is derived from the Greek word "cnidos", which means stinging nettle. As a part of their classification, these fish come from the sub-phylum Medusozoa and class Scyphozoa – which is the same as the jellyfish’s scientific name in the classification. [Click on the thumbnail image for a full-sized image]. Moon jelly, (genus Aurelia), genus of marine jellyfish of the order Semaeostomeae (class Scyphozoa, phylum Cnidaria) characterized by their pale translucent bodies and commonly found in coastal waters, particularly those of North America and Europe.The adult may grow as large as 40 cm (16 inches) in diameter. The term stauromedusa is derived from the Greek “stauro” for shape of a cross and jellyfish for the gorgona. Jelly fishes are diploblastic medusoid mostly marine animals with coelenteron. 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