What kind of animal is Gonionemus?
marine hydrozoans
Gonionemus, genus of small marine hydrozoans (order Limnomedusae, phylum Cnidaria). The conspicuous jellyfish stage of Gonionemus species is bell-shaped and measures about 15 mm (0.6 inch) or more in diameter.
What type of individual is Gonionemus sp?
Pictures
| Title | Swimming individual |
|---|---|
| Caption | Gonionemus vertens (clinging jellyfish); view of a swimming individual. Note the ‘knee-like’ articulation of several of the tentacles at the adhesive pad. Also note the tan-colour on the manubrium, the gonads and, on the tentacle bulbs. |
What is velum in Gonionemus?
Velum: The margin of the Gonionemus medusa projects inward. They form a shelf like lip called the velum. A velum is present on most hydrozoan medusae. But it is absent in all other cnidarian classes. Water is expelled from beneath the medusa.
What class does obelia belong to?
HydrozoansObelia / Class
Is obelia an animal?
Obelia, genus of invertebrate marine animals of the class Hydrozoa (phylum Cnidaria). The genus, widely distributed in all the oceans, is represented by many species. The animal begins life as a polyp—a tentacled, stalklike form resembling a small sea anemone attached to the ocean bottom or some other solid surface.
What is a velum in Hydrozoa?
Free-living medusoid hydrozoans can be hard to tell from scyphozoans, but hydrozoan medusae generally have a muscular shelf, or velum, projecting inward from the margin of the bell. This structure is not found in scyphozoans.
What is the phylum of Hydra and Obelia?
Hydra and Obelia are two organisms that belong to the class Hydrozoa. Hydrozoa belongs to the phylum Cnidaria, which contains radially symmetric, diploblastic organisms. The two body forms of Cnidarians are polyp and medusa. The primary body form of the Hydrozoa is the polyp.
What classification is Obelia?
What is medusa in biology?
medusa, in zoology, one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria. It is the typical form of the jellyfish. The medusoid body is bell- or umbrella-shaped. Hanging downward from the centre is a stalklike structure, the manubrium, bearing the mouth at its tip.
Which phylum has polyp and medusa stages?
phylum Cnidaria
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).
What is Craspedote medusa?
163.2k+ views. Hint: Craspedote medusa is present in that pair which is a genus of medium to large rhizostoma tid jellyfish found in the East Atlantic Ocean (the North Sea and the British Isles to South Africa) and the Mediterranean Sea. Complete answer: Craspedote medusa is present in Aurelia and Rhizostoma.
What is the classification of Obelia?
Are medusae benthic?
Many of them show a phenomenon known as an alternating life cycle, which includes a benthic stalked (polyp) form, and free-swimming jellyfish (medusa) form.
What is a medusa in biology?
Which are characteristics of medusae?