Giant jelly ascidian - Polycitor giganteus (RHS) next to Basal ascidian with encrusting sponge. The big siphon on the left performs the same function as the little orange ones on the right; the left one is a single animal and the right is a colony
Nature's amazing underwater garden again! Inside these ascidians is a small animal that siphons and filters water for food; you can see the orange siphon clearly on the basal ascidian down the bottom