Hydrozoa (hydrozoans; from Ancient Greek ὕδωρ (húdōr) 'water' and ζῷον (zôion) 'animal') is a taxonomic class of individually very small, predatory animals, some solitary and some colonial, …

Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are solitary, carnivorous jellyfishlike animals [2], native to the temperate and …

水螅 （螅 音同 西， 学名： Hydra），屬於 刺絲胞動物門 中的 水螅綱，多細胞無脊椎動物，包含有芽體（Bud）、 精巢 （Testes）；最常見的有褐水螅（H. fusca），綠水螅（H. viridis）。 …

4 天之前 · 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 …

Perhaps the best-known hydrozoan, familiar to most students of introductory biology, is Hydra, pictured at left. Hydra never goes through a medusoid stage and spends its entire life as a …

Hydroid, any member of the invertebrate class Hydrozoa (phylum Cnidaria). Most hydroids inhabit marine environments, but some hydroids have invaded freshwater habitats. Hydroids may be …

2025年1月29日 · The Class Hydrozoa is the most diverse group of cnidarians. Although marine species vastly outnumber freshwater ones, the genus Hydra may nevertheless be the best …

The Hydrozoa is a subgroup of cnidarians containging approximately 3700 species. It is a diverse group with a variety of life cycles, growth forms, and specialized structures. Like many …

5 天之前 · The genus Hydra (Cnidaria, Hydrozoa) comprises a group of aquatic organisms that inhabit freshwater bodies worldwide, except for Antarctica. Hydras are widely recognized for …

2025年1月16日 · A new species of the genus Hydra from China (Hydrozoa: Hydrida). - Acta Zootaxonomica Sinica 25: 134-138.