Sigillina signifera predated by Nembrotha crsitata

This is a spotting to introduce the species of sea squirt Sigillina signifera. It is the small tunicate colonies above the nudibranch in green blueish coloration. They happen to be very tasty for nudibranchs and this nudi here is having a meal out of them.
See a similar scene here:
https://www.naturepl.com/stock-photo-nudibranch-nembrotha-cristata-eating-a-tunicate-sigillina-signifera-nature-image01555925.html