New behavior by oldest clown loach

[samifers]

Hello,

I have 4 clown loaches, the oldest being 11 years old. Fred, the oldest, has started swimming around with gravel in his mouth, like it’s a toy. When it comes to feeding time, he drops it, but then picks it back up. I’ve never heard of this and was wondering if it’s normal, goofy loach behavior. He is otherwise perfectly healthy.

[millsn]

I had one do this, no good reason, pretty sure he got over it