Description

Also known as Ascidian Tunicate, Calloused Tunicate, Colonial Ascidian, Colonial Ascidian Tunicate, Compound Ascidian, Daisy Ascidian, Dark Ascidian, Encrusting Colonial Ascidian, Golden Star Ascidian, Golden Star Tunicate, Harbour Star Ascidian, Ladder Ascidian, Ladder Tunicate, Leach's Compound Ascidian, Lined Compound Ascidian, Pacific Star Tunicate, Schlosser's Ascidian, Scholoser's Sea Squirt, Sea Squirt, Star Ascidian, Tiger Tunicate, Tunicate, Zooids.

Found in colonies, spreading and encrusting, in an invasive manner, over algae beds, hard surfaces, and slow moving submerged objects, like boats, invertebrates, plants, etc., on shallow reefs. Variable in colour and shape.
They feed on zooplankton
Length - 5cm - Spreading
Depth - 0-100m
Worldwide

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: https://en.wikipedia.org/wiki/Botrylloides_leachii