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Hydranthea Diaphana
''Hydranthea'' is a genus of cnidarians belonging to the family Lovenellidae. Like other Hydrozoans they are colonial. They have hydrorhiza connected to tubular stolons attaching them to other objects, like algae, kelp, rocks and crabs. Description Hydranthea have small smooth hydrophores placed irregularly along their hydrorhiza, of variable length - though they tend to be shorter. They have elongated polyps along their stems. Their bodies are pale gold in color, with a thin white band below the hypostome, an appendage on their mouth. Their tentacles, of which they have 30 per whorl, are long and colorless and connected to each other at their bases by an intertentacular web. They have around two to three Nematocysts between each set of tentacles on this web. Hydranthea have oval gonophores, a reproductive structure, on their hydrorhiza. They are dieoecious, with usually only one sex, male or female, present within a single colony. Behavior Hydranthea are active and cap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidaria
Cnidaria () is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in freshwater and marine environments, predominantly the latter. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell thick. Cnidarians mostly have two basic body forms: swimming medusae and sessile polyps, both of which are radially symmetrical with mouths surrounded by tentacles that bear cnidocytes. Both forms have a single orifice and body cavity that are used for digestion and respiration. Many cnidarian species produce colonies that are single organisms composed of medusa-like or polyp-like zooids, or both (hence they are trimorphic). Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors. Several free-swimming species of Cubozoa and Scyphozo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
