Hydra (/ ˈhaɪdrə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.

Apr 12, 2025 · Hydra, genus of invertebrate freshwater animals of the class Hydrozoa (phylum Cnidaria). The body of such an organism consists of a thin, usually translucent tube that measures up to about 30 millimetres (1.2 inches) long but is capable of great contraction.

In this article, you will learn about this fantastic creature in detail: by definition, classification, and cellular structure. I will show you several interesting behaviors when a hydra feeds or move. We will also see what happens to a sick hydra. Finally, you will also learn where and how to collect a hydra for your microscopic project.

Hydra are a genus of small, fresh-water organisms that are classified under the phylum Cnidaria. In addition to being related to such organisms as jellyfish, they are characterized by their tiny, tube-shaped bodies that contain several tentacles on one end.

Aug 3, 2023 · Hydra are inconspicuous freshwater relatives of corals, sea anemones, and jellyfish that are classified under the phylum Cnidaria, Class Hydrozoa, Order Anthomedusae/Anthoathecata, and Family Hydroidea.

Hydras can be found in virtually every kind of aquatic habitat, though they are most common in fairly quiet waters such as sunlit pools, where they attach to submerged vegetation and other objects, stretch out their tentacles, and “hunt.”

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Learn about the hydra (Coelenterata spp.) benthic macroinvertebrate by exploring the life cycle, feeding habitats, interesting facts and its role in the food chain. Watch videos of the live benthics to see how they move and view pictures of their different life stages.

Hydra( HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria. They are native to the temperate and tropical regions. The genus was named by Linnaeus in 1758 after the Hydra, which was the many-headed beast of myth defeated by Heracles, as when the animal has a part severed, it will regenerate much like the mythical hydra’s heads.

Sep 1, 2020 · Hydra, a freshwater diploblast, with a simple but defined body plan, an organized nervous system, and the presence of stem cells, is one of the oldest model organisms used in biology.