ID Please

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GregK

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Hi, Please let me know if this snail/slug critter is good or bad. He eats algae very well.
Not sure if danger to corals or fish. Mostly moves around evenings. Second Pic ID is some type of coral. Not sure, think it must of come in with some live rock.

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looks like a stomatella snail, behavior matches anyway. Although it is very white in the picture. Does it carry a small hard flat shell towards the front part of its body?

Coral looks like button polyps.
 
thx for the feedback Riaan, difficult to tell if it has a hard flat shell. would of thought no shell by the picture.
Always on rock never seen it on the glass. Are these reef safe, as well as would hermits /cleaner shrimp eat them
 
Definitely a stomella. I had two now sadly only one. Reef safe and my hermit and cleaner shrimp don't go near him. These buggers can move with surprising pace!
 
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the shell are about a third of their body size, maybe even smaller. And flat. Not very visible.

If stomatella, they are mostly active at night, and they do move rather fast. Being vegetarian they are good guys to have.
 
Hi Riaan, on a different note. Do you know if Aptasia move around on a rock. I had one in my tank that removed from a piece of live rock. When I noticed again it was no longer at the bottom of the rock but nearly the top . Same Aptasia and am very sure there was only the one. Thought maybe they can move around like some types of corals.
 
They are after all anemones. Yes they can move around.
 
just viewed your tank on TOTH, totally mind blowing and awesome...well done and thx for the advice
 
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