Mystery creature

[Eaglej]

I am fairly new to this - have a 9 gallon nano, marine tank. Something is living in the live sand, has made a hole beneath the live rock, and spits out sand from time to time. Can't see into the hole due to the angle of the tank and the hole. Anyone have a suggestion of what this might be?

 

[slitherbomb]

Probably a pistol shrimp.

 

[kingcrab]

could be the fellas that live in bikini bottom ??? lol

 

[joy13]

It could be a shrimp, or crab.

 

[redsea]

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