Clavelina moluccensis

Clavelina moluccensis, common name bluebell tunicate, blue bell tunicate, or blue sea squirt 
is a species of tunicate (sea squirt), in the genus "Clavelina" (the "little bottles"). Like all ascidians, these sessile animals are filter feeders. 
Description.
This species is 0.5-2.5 cm long, and light to medium blue in colour. The top of the zooids contain characteristic dark blue patches and spots that are always visible.
Distribution.
This species is found in the waters around Australia, Western Pacific, Indonesia, Papua New Guinea, Mariana Islands, Philippines, Singapore, and Malaysia.
Habitat.
This species grows in clusters attached to dead coral or other hard substrates, normally under overhangs.