Also known as Barrel-shaped Tunicate, Colonial Ascidian, Colony Sea Squirt, Compound Ascidian, Golden Sea Squirt, Green Barrel Sea Squirt, Green Reef Sea Squirt, Green Tunicate, Green Urn Ascidian, Green Urn Sea Squirt, Molle Tunicate, Sea Squirt, Soft Sea Squirt, Tall Urn Ascidian, Tunicate, Urn Ascidian, Urn Sea Squirt.
Found in colonies, anchored to hard surfaces of dead coral and rocks, over shallow reefs.
They feed on suspended plankton and zooplankton.
Length - 3cm
Depth - 0-20m
Widespread Indo-West Pacific
These urn shaped ascidians have numerous and minute oral siphons.
Often confused with Didemnum robustum which has numerous bigger oral siphons.
They vary in colour from white, orange to bright green.
The green colour inside is the result of being inhabited by minute blue/green algae.
The Egyptian sea star - Gomophia egyptiaca and the Sea Snail - Gyrineum gyrinum prey upon this sea squirt. (edit) Ref: https://en.wikipedia.org/wiki/Didemnum_molle