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Also known as Colonial Ascidians, Compound Ascidians, Blue Transparent Sea Squirt, Blue Sea Squirt and Blue Tunicate. They feed on suspended plankton and detritus. Often fed upon by the Nembrotha Sea Slug. They grow to a length of about 7cm.
Found in groups in sheltered reef flats and slopes. Widespread in the Indo-Pacific region.
It's quite refreshing seeing these delicate creatures underwater!