Corals also belong to the Anthozoa class (© Depositphotos). 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. Confused by a class within a class or an order within an order? [Click on the thumbnail image for a full-sized image]. While four of the classes that belong to the phylum Cnidaria are often considered as jellyfish, true jellyfish belong to the class Scyphozoa. 'comb' and φέρω, pherō, 'to carry'; commonly known as comb jellies) comprise a phylum of invertebrate animals that live in marine waters worldwide. Apart from the jellyfish, other species that belong to this phylum include corals, sea anemones, hydras, sea pansies, sea fans and sea whips. Jellyfish is included in phylum Cnidaria, class Scyphozoa. Next, jellyfish belong to the Scyphozoa class. 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 … There are three main classes in the phylum. Jellyfish belong the phylum "Cnidaria" which is part of the kingdom "Animalia". The word 'Cnidaria' is derived from the Greek word "cnidos", which means stinging nettle. Cnidaria: information (1) ... Phylum Cnidaria corals, sea anemones, jellyfish, and relatives. Craspedacusta is not a true jellyfish; true jellyfish are exclusively marine in habit and belong to the class Scyphozoa (phylum Cnidaria). 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! Freshwater jellyfish, any medusa, or free-swimming form, of the genus Craspedacusta, class Hydrozoa (phylum Cnidaria). If you'd like to learn about how this jellyfish got its name or how it is related to other organisms, keep scrolling down! ... Phylum Cnidaria corals, sea anemones, jellyfish, and relatives. They are divided in different orders and families. Medusozoa comes from the Ancient Greek Μέδουσα, which comes from the word for “rule over” (μέδω). The Carukia barnesi's exact classification is always up for debate, as are many other organisms' classifications. Craspedacusta sowerbyi, which is Classification . Jelly fishes are diploblastic medusoid mostly marine animals with coelenteron. 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. Hydras are hydrozoans. Finally, Anthozoa are corals and sea anemones. Cassiopea, genus of marine jellyfish constituting the order Rhizostomeae (class Scyphozoa, phylum Cnidaria) and found in tropical waters. Science is always changing and evolving, and with that, the characteristics which define a class, order, family, etc. The term stauromedusa is derived from the Greek “stauro” for shape of a cross and jellyfish for the gorgona. To this class of the Cnidaria phylum, belong approximately 50 species commonly known as stalked jellyfish or stauromedusa. The classification would be like: Kingdom Animalia Phylum Cnidaria Class Scyphozoa 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. The first class is Hydrozoa. Members of the genus measure more than 100 mm (4 inches) in diameter. There are over 11,000 Cnidarian species. Jellyfish come in a wide variety of shapes and sizes. They are flattish, with four to six flat, short-sided branches projecting from both sides of the mouth, or oral, arms. Cnidaria: information (1) Cnidaria: pictures (133) Cnidaria: specimens (7) Class … The classes that belong to the phylum Cnidaria corals, sea anemones, jellyfish, true jellyfish true! Marine in habit and belong to the class Scyphozoa measure more than 100 mm 4... The term stauromedusa is derived from the Ancient Greek ÎœÎ­Î´Î¿Ï ÏƒÎ±, which is part the! Stalked jellyfish or stauromedusa genus measure more than 100 mm ( 4 inches ) diameter... 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