are sessile ascidians
that live in coastal waters at depths of up to 80 m
). Like all ascidians, sea tulips are filter feeders. Their common name comes from their appearance - that of a knobbly 'bulb' or flower attached to a long stalk. Sea Tulips come in a variety of colours, including white, pink, yellow, orange, and purple. The colouration of sea tulips depends upon their association with a symbiotic sponge
that covers their surface.
Despite their common name, sea tulips are animals and not plants.
In South Africa, Pyura Stolonifera is commonly referred to as "Rooi Aas" (Red Bait).