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canvas prints invertebrate canvas prints invertebrates canvas prints cnidarian canvas prints coelenterate canvas prints daphnia canvas prints hydra canvas prints hypostome canvas prints nematocyst canvas prints tentacle canvas prints toxin canvas prints water canvas prints flea canvas prints hydrozoans canvas prints asexual canvas prints reproduction canvas prints

photographs invertebrate photos invertebrates photos cnidarian photos coelenterate photos daphnia photos hydra photos hypostome photos nematocyst photos tentacle photos toxin photos water photos flea photos hydrozoans photos asexual photos reproduction photos

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Coloured scanning electron micrograph (SEM) of Freshwater cnidarian (Hydra sp.) has captured water flea (Daphnia sp.) by releasing nematocysts from its tentacles. Hydra is a small freshwater coelenterate in the family Hydridae. It has a stalk-like tubular body and a ring of tentacles around its mouth. Hydras belong to the phylum Coelenterata (also called Cnidaria), which includes corals, sea anemones and jellyfish. Coelenterates are primarily marine animals, but hydras are found in freshwater ponds, lakes, and streams. The tentacles possess nematocyts and when the prey gets close to the tentacle the nematocysts fire into the prey. The tentacle then coils around the prey to bring it to the mouth region. They are native to temperate and tropical regions. Scientists are interested in Hydra because of their regenerative ability. Magnification x12 when shortest axis printed at 25 millimetres.

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