vesipesäkköjä
Vesipesäkköjä, scientifically known as Hydrozoa, are a class of marine and freshwater animals belonging to the phylum Cnidaria. They are characterized by a complex life cycle that often involves alternating between a sessile polyp stage and a free-swimming medusa stage. This alternation is not universal, with some species exhibiting only one of these forms or having variations in the cycle.
Polyps are typically small, tubular structures that attach to a substrate. They can live solitarily or form
Feeding in hydrozoans is carnivorous. They use specialized stinging cells called nematocysts, located on their tentacles,
Hydrozoans inhabit a wide range of aquatic environments, from shallow coastal waters to the deep sea, and