Useien
Useien is a genus of small, soft-bodied marine invertebrates belonging to the phylum Cnidaria. They are closely related to jellyfish and sea anemones, sharing the characteristic presence of stinging cells called nematocysts. These specialized cells are used for capturing prey and defense. Useien are typically found in temperate and tropical waters worldwide, often inhabiting shallow coastal areas, coral reefs, and kelp forests. They exhibit a sessile lifestyle for at least part of their life cycle, attaching themselves to surfaces like rocks, shells, or other marine organisms.
The body of a useien is generally cylindrical, with a mouth at one end surrounded by a