Hi, I've been cycling 8kg of live rock for a week now, and only just came across this bizarre fleshy mass protruding out of the side of one of the rocks. The rock itself is quite porous, and this thing seems to have grown right through the interior from end to end, in a cylindrical shape as far as I can tell. It's a dark blue / mauve colour. Oh, and the light purple part is where I accidently scraped it with a turkey baster (it's how I realised it wasn't actually rock in the first place!) Any help ID'ing it would be a big help, because so far I've come up empty handed trying to ID it myself. While I'm at it, I should also mention the green/yellow/orange encrusting growth on the underside of the rock as well. It is in an area that receives minimal lighting, and has been growing rapidly. Is it some form of encrusting sponge? I'm feeling pretty ignorant right now, but I have to say, this hobby never ceases to amaze and captivate me at every turn. Thanks!