Hydra (genus) - Wikipedia
Hydra (/ ˈhaɪdrə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.
Hydra | Freshwater, Cnidaria, Polyp | Britannica
2024年12月7日 · 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.
Lernaean Hydra - Wikipedia
The Lernaean Hydra or Hydra of Lerna (Ancient Greek: Λερναῖα ὕδρα, romanized: Lernaîa Húdrā), more often known simply as the Hydra, is a serpentine lake monster in Greek mythology and Roman mythology. Its lair was the lake of Lerna in the Argolid, which was also the site of the myth of the Danaïdes.
HYDRA Scientific film - YouTube
Hydra – History, Biology, Characteristics and Reproduction0:00 HYDRA educational film0:08 History2:50 The Body Structure of Hydra5:40 Cell types8:50 Nervous ...
Hail the Hydra, an Animal That May Be Immortal | Live Science
2015年12月22日 · Tentacled hydra may be immortal in perfect conditions, according to a new study that finds no sign that these animals lose fertility or become more likely to die with age.
Hydra – Biology, Classification, Characteristics, and ...
Hydras are classified under the phylum Cnidaria and the class Hydrozoa. Examples of Cnidarians include jellyfish, sea anemones, corals, and hydras. They all share a feature: “using stinging cells to protect themselves or hunt for food”.
Hydras - Missouri Department of Conservation
Hydras resemble tiny, delicate, elongated sea anemones. They have a columnar or trunklike body, which is structurally a bag (with the mouth at the top). The mouth is rimmed with several long tentacles.