hüdriidid

Hüdriidid refer to a group of organisms within the class Hydrozoa, which are part of the phylum Cnidaria. These marine invertebrates are characterized by their polymorphic life cycles, often involving both a sessile polyp stage and a free-swimming medusa stage, though one or both may be absent in certain species. The polyp stage typically forms colonies, which can vary greatly in size and complexity. These colonies are often specialized, with different polyps performing distinct functions such as feeding, reproduction, or defense. The medusa form, if present, resembles a small jellyfish.

Many hüdriidid species are colonial, meaning they are composed of genetically identical individuals that are connected and functionally integrated. This colonial structure allows for efficient resource acquisition and defense. Predominantly marine, some hüdriidid species can be found in freshwater environments. They are carnivorous, feeding on small invertebrates like plankton and small fish, which they capture using stinging cells called nematocysts located on their tentacles. Reproduction in hüdriididids is often complex, involving both asexual reproduction through budding and sexual reproduction. The diversity within Hydrozoa means that hüdriididids exhibit a wide range of sizes, appearances, and ecological roles within their respective habitats.