The correct option is
A PyrosomaPyrosoma are tunicates. These are the free-floating colonial tunicates. These organisms live on the upper layers of the oceans. They are cylindrical or conical shaped colonies. The colonies are made up of many number of individuals which are called as zooids. They are brightly bioluminescent. They have the ability to flash a pale blue-green light. This light is bright enough to be seen from a very far distance.Thus, the correct answer is option A.