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Hydra (genus) - Wikipedia


Hydra /ˈhaɪdrə/ is a genus of small, fresh-water animals of the phylum Cnidaria and class ... cnidae), is clothed with highly specialised stinging cells called cnidocytes. ... The cel...

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.

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 ...

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).

The Anemones, Corals and Jellyfish (Phylum Cnidaria)


10)May have a minimal skeleton of chiton or calcium carbonate. Introduction. The Cnidaria (pronounced nidaria)as a group of animals are well known to many ... specialised cells which contain the Nematocysts, the stinging organelles that allow ... at the opening, generally surrounded by tentacles, there is no distinct anus.

Box Jellyfish, Box Jellyfish Pictures, Box Jellyfish Facts ... - Animals


Up to 15 tentacles grow from each corner of the bell and can reach 10 feet (3 meters) in length. Each tentacle has about 5,000 stinging cells, which are triggered ...

Chapter 3: Phylum Cnidaria

www2.hendrix.edu/biology/dearolf/Zoology Manual chap3&4 - Secured.pdf

Cnidocytes, or stinging cells, are the distinctive characteristic of. Phylum Cnidaria .... tentacles, is free swimming, and has a much thicker mesoglea. Look at the slide ..... Be able to identify the organism and know it is a pseudocoelomate.

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). ... Its long tentacles hanging down from the bell's rim, can reach five metres while being ...

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 ...