Today I came across this bizarre little creature at Changi. It's the weirdest thing I've so far.
There were quite a few of them, in various colours and patterns, but all looked like tiny coral colonies. I tried to and managed to pry one off the rock. At first, with its flat foot, I thought it was some kind of mollusc. A slug perhaps?
this article about an 'armoured sea cucumber'. It is Psolus parantarcticus, which has "conspicuous dorsal and lateral scales".