The medusa body form is responsible for _____ reproduction. • Medusa has its mouth directed downwards while polyp has it directed upwards. Free swimming, found in open waters. Corals have separate sexes, some corals have male organs while others have female organs in the same ways some of the corals are hermaphrodites in nature i.e they have both male and female organs on the same body. Medusa has a bell-shaped body. 2. Polyp and Medusa are two different body forms, here one is nonmotile in nature and other is in free swimming. These four classes consist of one or two forms of body structure (Polyp and medusae). Some of them exist in polyp form while others are in medusa form as these forms are staged in their life. Medusa have their mouths facing the water downwards. Budding in polyp can form either polyp or medusa. Polyp is formed with a mouth surrounded with tentacles, referred to as a head and head is attached to the bottom with a foot-like disk. Thin layers called endoderm and ectoderm line the outside and inside, respectively; between these is a layer of jellylike material, called mesoglea, of v… Whereas medusa have the shape of a muscular bell which enables them to swim. Difference Between Biology and Microbiology, Difference Between Biology and Biotechnology, Difference Between Biology and Biochemistry, Difference Between Environment and Ecosystem, Difference Between Chromatin and Chromosomes, Difference between Cytoplasm and Protoplasm, Difference Between Respiration and Combustion, Vedantu The body wall is composed of three layers of tissue. Polyp is cylindrical in shape. polyp and medusa, names for the two body forms, one nonmotile and one typically free swimming, found in the aquatic invertebrate phylum Cnidaria (the coelenterates). The mouth is surrounded by tentacles, which are used to capture food and convey it to the mouth; these tentacles are armed with stinging cells which paralyze the prey. Mode of reproduction in polyp is either sexual or asexual. Polyp and medusa are two different types of aquatic invertebrates of phylum Cnideria (coelenterates). That's radi… This is the beginning of the rest of the animal kingdom, the eumetazoa, or "true animals" (we eumetazoans are a little biased). In the case of Hydrozoa, their mouth is present at the end of a tube hanging down from the bell, which is known as manubrium. ADVERTISEMENTS: 3. Medusae are motile, with the mouth and tentacles hanging from the bell-shaped body. Polyp and Medusa are two different body forms, here one is nonmotile in nature and other is in free swimming. Members of one class of cnidarians, the Anthozoa, exhibit only the polyp body form; most species of the other three classes (hydrozoans, scyphozoans, and cubozoans) alternate in their life cycles between polypoid and medusoid (free-swimming) body forms. There is a large diverse feature between polyp and medusa which are evolved by passage of time, some of these features are medusa sexual reproductive ability, medusa free swimming ability as all these features are complex morphological features than that of polyp, as polyp lacks all these features. Sorry!, This page is not available for now to bookmark. Some species of Cnidaria have both stages i.e polyp and medusa, example: Hydrozoa. Polyp vs Medusa . Polyps are sessile. One of the most common examples of species having a medusa life cycle is Hydrozoa or jellyfish. Base above so that manubrium hangs downward. The differences between polyp and medusa are described below: Polyp. sexual. Main Difference – Polyp vs Medusa. The phylum: Cnidaria consists of four classes: Hydrozoa (Hydra, siphonophores), Scyphozoa (Jellyfish), Cubozoa (Box jellies) and Anthozoa (Sea anemones, corals, sea pens).Anthozoa is sessile. The mouth of polyps faces the water upwards. Velum is absent: 4. Write a Few Differences Between Polyp and Medusa? Example: Sea anemone and fresh water hydra: Jelly fish: ADVERTISEMENT. Example : Jellyfish . At a given time following the secretion of pheromones, corals release a big number of sexual cells in the water. Their mouth is present at the opposite end and is surrounded with tentacles forming the head part. 2. medusa is that polyp is a fixed, cylindrical structure, representing the asexual stage and medusa is a fr ee swimming, umbrella like structure, repr esenting the sexual stage. Share. 5. Sessile . Whereas medusa reproduce sexually only and they give rise to medusa live stage cycle only. Mode of reproduction in medusa is sexual, but their development varies within the class of the cnidaria phylum as in case of hydrozoa class new members are formed by budding. There are around 3,300 species. Phylum Cnidaria, which include about 9000 species is also commonly called Coelenterata. 1. Mouth is faced downward. 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