What animals are in the phylum ctenophora?

Asked By: Zhijun Sayzar | Last Updated: 16th March, 2020
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Ctenophores, variously known as comb jellies, sea gooseberries, sea walnuts, or Venus's girdles, are voracious predators. Unlike cnidarians, with which they share several superficial similarities, they lack stinging cells. Instead, in order to capture prey, ctenophores possess sticky cells called colloblasts.

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Similarly, it is asked, what animal is found in the phylum ctenophora?

Comb Jellies

Also Know, do Ctenophores have a Gastrovascular cavity? Since this structure serves both digestive and circulatory functions, it is known as a gastrovascular cavity. Ctenophores have no true anus; the central canal opens toward the aboral end by two small pores, through which a small amount of egestion can take place.

Consequently, how many Ctenes do organisms in phylum ctenophora have?

Most species have eight strips, called comb rows, that run the length of their bodies and bear comb-like bands of cilia, called "ctenes", stacked along the comb rows so that when the cilia beat, those of each comb touch the comb below.

What are the examples of ctenophora?

Tentaculata Nuda

39 Related Question Answers Found

Do Ctenophores have eyes?

Ctenophores such as Pleurobrachia pileus, nicknamed “sea gooseberry or cat's eyes”, has tentacles which they can entirely retract into inner pockets of their body. These tentacles, on which the colloblasts are located, enable them to move the food back to their mouth.

Are comb jellyfish still alive?

Comb jellies live throughout the world's ocean, although most species prefer warmer water.

Who discovered ctenophora?

(i) Martens, a doctor, first discovered ctenophores in 1671. Linnaeus placed the animals under the group zoophyta. (ii) Eschscholtz (1829) first created the order Ctenophora under Coelenterata.

Is ctenophora Triploblastic?

The general Characteristics of the Phylum Ctenophora are: Diploblastic , with ectoderm and entoderm , and a cellular mesenchyme , which gives, rise to the musculature (some researchers feel that Ctenophores are triploblastic , with a true mesoderm ).

Why do comb jellyfish light up?


"When light reflects off their cilia, it creates a rainbow of colors. But that's not the same as bioluminescence, which you can only see in the dark." Comb jellies' ability to generate light comes from genes that produce photoproteins. This molecule can be triggered to produce light when calcium is added to the system.

How do comb jellyfish reproduce?

Spawning occurs at night when water temperatures warm to 66-73 degrees. Comb jellies have both male and female reproductive organs and can fertilize themselves. Each comb jelly releases about 8,000 eggs per spawn. Unlike jellyfish, comb jellies develop without distinctive larval and polypoid stages.

Are comb jellies dangerous?

Comb jellies aren't harmful to humans, but they wreak havoc on the local ecosystem. In the Adriatic Sea, they don't have any predators yet. The rapidly reproducing comb jellies deplete supplies of plankton, as well as the eggs and larvae of fish like anchovies.

Where are Ctenophores found?

Ctenophores are fairly simple animals that live only in marine waters; they can be found in most marine habitats, from polar to tropical, inshore to offshore, and from near the surface to the very deep ocean.

Are Ctenophores endangered?

Not extinct

Why are ctenophora called sea walnuts?


They are named as Comb jellies, for their combs - the rows of cilia, lining their bodies that propel them through the ocean. They are walnut shaped and hence known as sea walnut.

Why are Ctenophores no longer in the Cnidaria phylum?

Unlike cnidarians, with which they share several superficial similarities, they lack stinging cells. Instead, in order to capture prey, ctenophores possess sticky cells called colloblasts. In a few species, special cilia in the mouth are used for biting gelatinous prey.

What is the difference between ctenophora and cnidaria?

Both cnidarians and ctenophores are diploblastic animals. Cnidarians exhibit radial symmetry whereas ctenophores exhibit biradial symmetry. Both contain tentacles, surrounding their mouth. The main difference between cnidarians and ctenophores is their body symmetry.

Are Cnidaria Diploblastic or Triploblastic?

The phylum Cnidaria (sea anemones, corals, hydras and jellyfish) is the likely sister group of the triploblastic Bilateria. Cnidarians are generally regarded as diploblastic animals, possessing endoderm and ectoderm, but lacking mesoderm.

Why does the ctenophora is a minor phylum?

Explanation: Ctenophora which are also known as the comb jellies is a phylum of marine creatures which move with the help of cilia in the underwater environment. The ctenophora phylum only includes very few genera and that's why it is considered as a minor marine phylum.

Are comb jellies Triploblastic?


Ctenophores are marine animals characterized by eight longitudinal rows of ciliary paddles called combs. These are used for locomotion (Figure 2) [24], and give the group its common name: 'comb jellies'. All ctenophores are carnivores. Most are pelagic, while some are benthic.

What is a Ctene?

Noun. 1. ctene - a locomotor organ consisting of a row of strong cilia whose bases are fused. comb-plate. comb jelly, ctenophore - biradially symmetrical hermaphroditic solitary marine animals resembling jellyfishes having for locomotion eight rows of cilia arranged like teeth in a comb.

What is another name for Gastrovascular cavity?

In cnidarians, the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice.