Okay can someone tell me what my clownfish are doing?

First of all earlier today one of them started rubbing itself not only on the other clownfish but also on any fish that didn't move fast enough.

Now they are swimming up to the filter and pushing either their fins or their tails into the gaps in the filter and lying there.

It's driving my Cleaner Wrasse mad, it spent almost 20 minutes trying to push them off the filter and now it's knackered, and they are still doing it.

Any ideas???