Isn't it beautiful?
A great number of these nudibranches was discovered at the rock by a closer inspection: it's enough to keep below still for a moment, searching for distinctive violet stains at the motley rug.
So, the chance of shooting various individuals was given.
Goffered white plate on a stalk is an Acetabularia acetabulum, and at the right is Padina pavonica, looking as a Milky Cap fungi.