Oh several things:

Our long nosed butterfly fish has some amusing behaviors. He has a very distinctive and unusual pattern of swimming where he can frequntly be witnessed looping completely upside down to check under an overhang, looks so silly. But his best trick is when he figures out that I amfeeding his favorite treat (those orange fish eggs) and he gets so excited that he begs for them at the surface of the water, with his little beak bobbing up out of the water. I should definitely try yo capture this on video, so thanks for that idea, Lucky.

When our biggest fish, the blue hippo, is the biggest chicken and tries to hide himself in a spot where he used to fit but no longer does. He is in plain view but thinks he's invisible!

When the pufferfish demands to be fed by squirting water at the feeder person.

We get SO MUCH enjoyment from watching our silly fish!! I have a hard time relating to the hobbyists who are such coral lovers that they decide to go with zero or one fish in a tank that could handle several.