Also known as Brittle Sea Squirt, Colonial Ascidian, Compound Ascidian, Sea Squirt, Tunicate.
Found in holes, and on top of the reef, in current swept areas.
They feed on plankton.
Length - 20cm
Depth - 12-15m
Widespread Western Central Pacific
Ascidian, also known as tunicates because their bodies are covered by a "tunic" a tough cellulose-like covering.
The other common name is sea squirt because when threatened they sometimes eject a jet of water. Ref: http://www.sealifebase.org/summary/Diazona-tenera.html