Olaf grabs the quarantined helmet full of Medusoid Mycelium. Some colonial Cnidaria develop as stolons with interconnected medusoid structures that later separate. Chondroplon bilobatum is a medusoid Ediacaran fossil. These comb jellies are often mistaken for medusoid Cnidaria, but lack stinging cells. The harpoon pierces the helmet, releasing the medusoid mycelium and injuring Count Olaf. A few hours later the Medusoid Mycelium wanes and they return to the submarine. For example, "Hydra" has no medusoid stage, while "Liriope" lacks the hydroid stage.