What is the difference between a polyp body shape and a medusa body shape?
Polyp are sessile while medusa are mobile. Polyp present a tubular shape with the mouth facing the water upwards,while medusa present a bell shape with the mouth facing the water downwards. Polyp produce either polyp or medusa by budding, while medusa produce only medusa.
What body form is a jellyfish?
Medusa
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.
Is the coral a medusa shape or polyp shape?
The class Anthozoa includes all cnidarians that exhibit a polyp body plan only; in other words, there is no medusa stage within their life cycle. Examples include sea anemones, sea pens, and corals, with an estimated number of 6,100 described species.
What is a polyp structure?
A polyp has a sac-like body and an opening, or mouth, encircled by stinging tentacles called nematocysts or cnidae. The polyp uses calcium and carbonate ions from seawater to build itself a hard, cup-shaped skeleton made of calcium carbonate (limestone). Most coral polyps have clear bodies.
What’s the difference between medusa and polyp?
Polyp is a sessile life stage of the cnidaria phylum whereas medusa is totally opposite i.e they have a mobile life cycle stage of the cnidaria phylum. 2. Morphology of Polyp and Medusa: Morphological features of polyp are tubular in shape and they are fixed at their base.
Do polyps turn into Medusa?
Cnidarians come in two basic shapes. An anemone is the polyp shape. If the polyp shape is turned upside down, it becomes the medusa shape of the jellyfish.
Why are hydras polyps?
Some species of hydra can produce both ovary and testis. Fertilized eggs develop a shell and remain dormant in harsh living condition until favorable condition for growth is restored. Now these eggs develop and thrive as polyp and reproduce asexually as polyp in favorable climate.