Clicking in the rocks POLL

[CubiX]

What creature was most often the cause of clicking noise in your live rock.

 

[justinl]

fish also snap at water sometimes. hermits or snails also sometimes get into an area of high flow and their shell smacks the glass. Im sure there's other reasons too

edit: heaters clicking on/off is a good one too

 

[Jay180reef]

Thought it was a mantis, but only a pistol