Ok, good to know its a pencil urchin. Hes cruising under one of the rocks, moving around in a hole.
I haven't seen the snail for about a day (hence no picture). Its somewhat hard to ID
its shell pattern as the shell was covered by various algaes. I'm thinking (from what I remember it looked like) its a banded tulip snail, mainly due to the shell shape and red foot. But an 8" snail is pretty big 8O The snail I saw was between 1/2" to 1"... hopefuly its slow growing
Thanks for your help!