Characteristic Characteristics Of Coelenterata

770 Words 4 Pages
Coelenterata - Characteristics of coelenterata are as follows: Coelenterata are creatures that live in the sea although there are some who live in fresh water.Coelenterata included in the class of diploblastik. Exterior body composition has epidermal cells and in the inner layer of gastrodermis. Coelenterata have a difference compared to the porifera where although equally hollow but coelenterata has only one hole for all activities such as eating and as a disposal. Another feature is on the outer layer of the epidermis layer has a cell that play a role to produce sting. This sting is the body's defenses against its enemies.

Between the epidermal and gastrodermis layers there is a layer called mesoglea usually has several cells. The uniqueness
…show more content…
Hydrozoa native habitat in fresh water, although some live in the sea. Hydrozoa usually live by sticking to objects that live in water, for example water plants. How to reproduce Hydrozoa asexually through shoots, while sexually by producing sperm and ovum but some are hermaphrodites.

Examples of Hydrozoa
…show more content…
Hydra viridis (green Hydra): life does not colonize fresh water like in a pool or stream with calm currents
b. Hydra fusca (Hydra brown)
c. Hydra attenuate (Hydra nodes)
d. Obelia sp: has a shape similar to a branching stem

2) Scyphozoa Class:

The characteristic feature of the Scyphozoa class is to have an inverted bowl-shaped body shape. experienced the dominant medusa phase compared to the polyp phase. His residence at sea, his reproduction sexual and asexual and having a hereditary turn.
For example Scyphozoa is Aurelia aurita (jellyfish).

The rotation process of the Aurelia offspring where the adult aurelia is a medusa phase. The process begins with a male Aurelia producing sperm while the female aurelia produces an ovum. When the sperm managed to fertilize the ovum then formed a zygote, this zygote then undergoes self-pembehana several times to form a spherical cell called blastula. Blastula then grows into a ciliated larvae. This larva will find the right place to grow into a polyp. The polyps then grow steadily until they expand and form new buds called strobilization). Over time buds will release one by one into the water into efira, efira then turned into medusa and grow into a mature medusa.

daaur live jellyfish

Related Documents