@why-animals-do-the-thing

What do you think is going on here? I thought at first that the white goby was just trying to burrow in a bad spot, but it does seem to be intentionally throwing sand on the jawfish. Both of those are fairly intelligent fish species who are very good at moving sand, so I don’t think that much targeted movement of sand into the tunnel is accidental. 

My only guess is maybe the jawfish (blue) stole the goby’s tunnel, and the goby is trying to drive it out. 

The clownfish, I’m guessing, is hanging around in hopes that the digging unearths tasty snacks. That, or it’s trying to intimidate the others.