Obelia

obelia

A colony of Obelia can be found in almost any marine environment. They are usually attached to rocks, shells, or other objects, but can also be found free-floating. Obelia can reach up to 50 cm in height, and have a cylindrical body with a small mouth at the top and a long, thin stalk coming out of the bottom. The stalk is used to attach the colony to a substrate, and can also be used to move the colony around. Obelia colonies are made up of individual polyps, which are small, tube-like creatures that can move around and feed. Each polyp has a small mouth at the top and a long, thin stalk coming out of the bottom. The stalk is used to attach the polyp to a substrate, and can also be used to move the polyp around.