Clavelina robusta (Stalked ascidian)


Dark blue to grey sea ascidian (sea squirt) with yellow to white rings around both siphons, they usually grow in high density colonies, the body is soft and mostly somewhat translucent.


Unevaluated by the IUCN Red list.


Western Pacific, Australia, Indonesia, the Philippines, Japan and the Solomon Islands, in a depth range of 10-30 meters.



Each zooid can reach up to 5cm in length, the total width of the colony can reach up to 10cm.

Prey / Predation

It is a filter feeder.

Special features

Little information is available on ascidians in general, making it more difficult to identify the many different species and families. Even though its body looks simple, it is actually more evolved than you’d expect.