Pyrosoma is a genus of pyrosomes, marine colonial tunicates in the class Thaliacea.

[1][2] It contains four pelagic species found in temperate waters worldwide.

Pyrosomes are filter feeders that uniquely use a type of continuous jet propulsion, generated by individual zooids, to slowly move forward while grazing; the species P. atlanticum has the highest known food clearance rate among zooplankton grazers.

Colonies can reach lengths of up to 20 m (66 ft).

[3] The genus contains four recognized species:[1]