I have a Caribbean pistol shrimp and a yellow watchman goby, the paired up as soon as I put them in the tank a year ago.
I had all my rock on top of the sand (big mistake)
They tunneled absolutely everywhere together and my rock slowly sank and broke in certain areas as they did this...
End result is...all my rock work is on the bottom now (and I didn’t do it, they did)![]()