Polycarpa aurata, also known as the ox heart ascidian, the gold-mouth sea squirt or the ink-spot sea squirt, is a species of tunicate in the family Styelidae.

The inside is yellow or orange and this is visible around the rim of the siphons.

Its range includes the Philippines, Indonesia and northern Australia.

[2] Tunicates feed by drawing water in through the branchial siphon at the top, filtering out phytoplankton, bacteria and other food particles, before expelling the water through the atrial siphon at the side.

hydroids and algae may grow on the outside of the tunicate[2] and nudibranchs such as Nembrotha lineolata sometimes feed on them.