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Cnidaria - Wikipedia


Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species. Their distinguishing feature ...

Cnidaria facts, information, pictures | Encyclopedia.com articles ...


It includes aquatic organisms such as jellyfish, sea anemones, corals, and hydras . ... tentacles, and many also have nematocysts (specialized stinging cells).

The Wonders of the Seas: Cnidarians - Oceanic Research Group


They are among the simplest of the so-called "higher" organisms, but are also ... All Cnidarians have tentacles with stinging cells in their tips which are used to ...

Identification guide and stinging treatment for jellyfish and other ...

jellyrisk.eu/media/cms_page_media/115/27.Jellyfish Guide 2014 - Spain (english).pdf

jellyfish and other stinging gelatinous organisms, which have specific cells called cnidocists that are like .... It has 4 oral arms and 24 thin marginal tentacles. It is.

Information on Hydra


Hydra are truly fascinating small aquatic animals. ... If disturbed, a hydra will contract its body and tentacles, so that it now resembles a small 'blob'. ... They have a number of different types of stinging cells, called nematocysts, on their tentacles ...

Animals With Tentacles | Animals - mom.me


Cnadrians are another group of sea animals that have tentacles. ... All cndarians have stinging cells called nematocytes that they use to envenomate prey or ...



Sea anemones and corals have the polyp form, while jellyfish are typical medusae. ... small (or thin) organisms (ones which have a large surface area compared to their volume) ... The tentacles are covered with stinging cells ( nematocysts).

Jellyfish | The Marine Biological Association


Jellyfish have stinging cells, called nematocysts. The 'sting' is coiled and fired like a harpoon when triggered. All species have nematocysts in their tentacles, ...

Hydra - Northern State University


Unlike more complex animals, cnidarians are designed around 2 sheets of ... of hydra have been recorded in the Great Plains, but most are difficult to identify ... Classification depends on the structure of the eggs and stinging cells (see below) . All of these species have tentacles that are similar in length to the column or ...

The Anemones, Corals and Jellyfish (Phylum Cnidaria)


The Cnidaria (pronounced nidaria)as a group of animals are well known to many ... as the Radiate Animals because they both have radial or biradial symmetry. ... specialised cells which contain the Nematocysts, the stinging organelles that allow ... at the opening, generally surrounded by tentacles, there is no distinct anus.

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Know your jellyfish: some sting, some don't - Seafriends


But jellyfish are also harbingers of pollution that kills other marine organisms. ... With about 200 species world-wide, one could easily learn to identify them. ... All cnidaria have stinging cells adapted to stun and catch prey (see box). ... It fishes the sea by swimming actively, letting its tentacles out and drawing them in again ...

Hydra and Other Cnidarians - The Biology Corner


A common organism to study in a biology lab is the hydra. ... Anemones are often very colorful and have hundreds of tentacles that wave in the water currents while ... The fish becomes paralyzed by the stinging cells and eventually is pushed into the anemone's ... In a single sentence, identify the MAIN POINT of the article.

DHEC: Jellyfish Sting


Jellyfish describes a number of marine animals capable of inflicting a painful, and ... which may carry millions of small stinging cells, nematocysts, each equipped with ... Like the cannonball, the mushroom has no tentacles, however, it possesses ... Though they infrequently visit our coast, swimmers should learn to identify ...