Odd Clown Behaviour

[TheGreatOne]

Hey everyone. I have noticed my clowns showing a stage behavior. I did a water change yesterday and also added some more sand and in the cave area in which the clowns like to stay they will go to the sand and look like they are swimming in place to push the sand out. It is more comical then anything and was just curious why they do this if anyone has seen this before.

 

[SeahorseKeeper]

They could be trying to clear space to spawn.