What is this creature

[n091505]

I am setting up a new 90G tank. Put in live rocks bought from local store. I saw a green creature yesterday, can anyone shed light if this is good or bad for the tank and what it is.

thanks

 

[Prov3:5-6]

Almost looks like a snail shell with some green algae on it.

 

[helitaiwan963]

Almost looks like a snail shell with some green algae on it.

+1

 

[Smitty]

+2...and welcome to the site.

 

[n091505]

Its not just a shell, it moves or crawls but cant see and feet on the creature. I looked at it very closely and saw tiny eyes. I will see if I can get a better photograph tonight and post it.

 

[Herbie]

Sounds like a hermit that took a slightly too-big shell. Does it flow or wobble as it moves?
Welcome!

 

[n091505]

it flows, at first i thought it was a lifeless creature just flowing but then as I said it has eyes or is my eyesight playing tricks on me.

 

[n091505]

Alright after lot of googling, I think the creature is a cerith snail. Thanks for all your feedback.