Organ Pipe Hydroid

Ectopleura larynx forms colonies usually no more than 6 centimetres (2+1⁄2 inches) high. The stems are tubular, with a yellowish integument, and are branched at the base. The polyps range in colour from pale pink to red, and consist of a central circlet of oral tentacles surrounded by larger, paler aboral tentacles.

E. larynx is found throughout the British Isles and the North Atlantic Ocean. It typically grows on rocks or attached to algae, and is most common in shallow waters, where it may foul piers and the undersides of boats. It forms colonies and can tolerate exposed habitats and strong water currents.

== References ==