[piercho]

My tuxedo seems to be mostly interested in coraline. It also does a fair job keeping red turf timmed back, but only if its very short and sparse. I suspect it is going through the red turf to get to the coraline. It won't go for fleshy algaes, at all, and doesn't do much to green turf (Derbesia?).

I've heard that diadema (long-spined) urchins will mow through just about anything they encounter, but I've never kept one myself.