What is meant by polyp and medusa?

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 are the functions of polyp and medusa?

Difference Between Medusa and Polyp
Polyp Medusa
Can reproduce sexually as well as asexually Exclusively sexual reproduction
Reproduction
Polyps can give rise to more polyps as well as medusae through budding Medusae can only give rise to medusae
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Sep 29, 2020

What is the difference between polyp and medusa of obelia?

Through its life cycle, Obelia take two forms: polyp and medusa. … During the polyp stage, the mouth is situated at the top of the body, surrounded by tentacles, whereas during the medusa stage, the mouth is situated at the distal end of the main body structure. Four gonads lie in this main body structure, or manubrium.

What is polyp in Cnidaria?

polyp, in zoology, one of two principal body forms occurring in members of the animal phylum Cnidaria. The polyp may be solitary, as in the sea anemone, or colonial, as in coral, and is sessile (attached to a surface). … The lower end of the polyp typically is adapted for attachment to a surface.

What are medusa and 11 polyps?

Polyp is a sessile life cycle stage of species who belong to phylum cnidaria. Famous examples of polyp are sea anemones and adult corals.
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Polyp and Medusa: Major Differences.
Polyp Medusa
1. They are sessile in nature. 1. They are mostly free-swimming in nature.

What is difference between medusa and polyp stages?

Medusa is a mobile life cycle stage of the Cnidaria phylum, contracting with it muscular bell. Polyp have a tubular shape and are fixed at their base, with the mouth present at the other end of the tube facing the water. Medusa have a bell shape, with tentacles hanging down. Polyp do not have a manubrium.

What is a polyp jellyfish?

Jellyfish have a stalked (polyp) phase, when they are attached to coastal reefs, and a jellyfish (medusa) phase, when they float among the plankton. … There they develop into polyps and begin to feed and grow. In spring, some of the polyps start to bud off immature jellyfish known as ephyra larvae.

Is a jellyfish a fish?

Jellyfish are not really fish, of course, because a fish’s anatomy is centered around its backbone, whereas the jellyfish is a dome-shaped invertebrate. … The cnidocytes on jellies’ tentacles discharge venom from a sac called a nematocyst. These help them to capture floating prey in the water column.

Is Hydra a polyp or medusa?

Hydra are small polyps from 1 to 20 mm in body length. The body is crowned by up to 10 or 12 tentacles. Usually the tentacles are of approximately the same length as the body, but may be somewhat shorter, particularly in the green hydra, and can exceed 20 cm in length in hungry brown hydra in quiet water.

What are jellyfish babies called?

After a segment separates from the strobila, it is called an ephyra, a juvenile jellyfish. Ephyrae mature into the medusa form.

Are jellyfish polyps sessile?

jellyfish. A sessile polyp (scyphistoma) stage asexually buds off young medusae from its upper end, with each such ephyra growing into an adult. The adults are either male or female, but in some species they change their relationship as they age.

Which organism possesses both a polyp and medusa phase of life?

They are the most primitive of animals whose cells are organized into distinct tissues, but they lack organs. Cnidarians have two body forms—polyp and medusa—which often occur within the life cycle of a single cnidarian. Sea nettle (Chrysaora fuscescens).

Does a jellyfish poop?

So, now we know how jellyfish eat. On to your next question: how do they poop? … Any waste – that’s poop – then comes back through the mouth. That’s because jellyfish only have one opening into their stomach, so waste comes out the same opening as food goes in.

Is jelly fish edible?

You can eat jellyfish in many ways, including shredded or sliced thinly and tossed with sugar, soy sauce, oil, and vinegar for a salad. It can also be cut into noodles, boiled, and served mixed with vegetables or meat. Prepared jellyfish has a delicate flavor and surprisingly crunchy texture.

How do jellyfish mate?

In this species, a male will use his tentacles to grab a female’s tentacles; he will then drag her around for a while before pulling her in close to him. Next, he will produce and release a spermatophore (sperm packet), and use his tentacles to pass it to one of the female’s tentacles.

Which animal does not poop?

Are there any animals that don’t poop? As a matter of fact yes there are: Tardigrades – These little alien-like critters only excrete when they molt. So any “fecal” matter produced it not really pooped out as we would really describe it.

What animal does not poop or pee?

Sloths only urinate and defecate once a week, said Schlott. “So when the floodgates open, it’s a big production,” she said.

What animal poops out of mouth?

In 1997, biologists again observed indigestible matter exiting the comb jelly mouth—not the mysterious pores. in addition, What animal poops cubes? Humans may be fascinated by cubes, but only one animal poops them: the bare-nosed wombat.

What animals Cannot feel pain?

Though it has been argued that most invertebrates do not feel pain, there is some evidence that invertebrates, especially the decapod crustaceans (e.g. crabs and lobsters) and cephalopods (e.g. octopuses), exhibit behavioural and physiological reactions indicating they may have the capacity for this experience.

What animal can hold breath for 6 days?

Answer: Scorpion can hold their breath for 6 days.

What animal poops round balls?

Deer poop is a common one to find. It’s found on the ground and it looks like lots of brown ovals in a pile. Rabbit poop is another common one. It’s smaller than deer poop, and forms perfectly round balls.