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The larva develops into the hydroid stage of the lifecycle, a tiny sessile polyp called a scyphistoma. The scyphistoma reproduces asexually, producing similar polyps by budding, and then either transforming into a medusa, or budding several medusae off from its upper surface via a process called strobilation. The medusae are initially ...
Polyp prey includes copepods and fish larvae. [2] Longitudinal muscular fibrils formed from the cells of the ectoderm allow tentacles to contract when conveying the food to the mouth. Similarly, circularly disposed muscular fibrils formed from the endoderm permit tentacles to be protract or thrust out once they are contracted.
Neck-formation: transverse constrictions appear near the upper extremity of the animal. A strobilating polyp is called a strobila while the non-strobilating polyp is called a scyphistoma or scyphopolyp. Segmentation: the number of constriction sites [jargon] increases and migrates down the body length, transforming the body into a sequence of ...
A larva (/ ˈ l ɑːr v ə /; pl.: larvae / ˈ l ɑːr v iː /) is a distinct juvenile form many animals undergo before metamorphosis into their next life stage. Animals with indirect development such as insects , some arachnids , amphibians , or cnidarians typically have a larval phase of their life cycle .
After fertilization, the egg develops into a free-living larva, or planula. The planula floats around until it attaches itself onto a hard substrate, metamorphosing itself into a polyp called, scyphistoma. The scyphistoma will reproduce asexually through budding, and transform into a strobila.
The similar appearances of moon jellyfish is what has made them so hard to identify. They tend to have a variety of different sizes, however, they typically range 5–38 cm (2.0–15.0 in) in diameter with an average of 18 cm (7.1 in) wide and 8 cm (3.1 in) in height. [12]
Within the cyst, a scyphistoma—a single developing medusa—forms and is now called a chorion. Once the chorion grows into about 2 mm (79 mils) long and 2–3 mm (79–118 mils) in diameter with teat-shaped distal ends (which are basal outgrowths), it begins to be pushed out of the chamber.
Aurelia aurita (also called the common jellyfish, moon jellyfish, moon jelly or saucer jelly) is a species of the family Ulmaridae. [1] [2] All species in the genus are very similar, and it is difficult to identify Aurelia medusae without genetic sampling; [3] most of what follows applies equally to all species of the genus.