I need some help identifying this guy. I recently added some new corals to my aquarium and low and behold i spotted this fellow (some 3 inches long and shaped like a xmas tree) in my tank. He looks a heck of a lot like an algae covered rock and eats my green algae (not bad actually), but i am afraid that he may get much bigger and start eying my xenias or other softies. He has the consistency of jello (as i scooped it out of the aquarium and into the bag) and i have no problems with my hand so he is not poisonous - i know that was not too bright but i could not grab him with a net. Any help would be appreciated - looks like a funky sea slug, but unsure.
