Lump on BTA - any ideas?

[Crowbar]

Hi there! I've had this BTA for a few months now, and it's always been nice and happy. Recently my clownfish has taken up residence in it and I feel like it's looked extra big and content.

Today I noticed this weird little bump on its body, though. It doesn't seem to be behaving any differently or have any sort of injury, and it hasn't moved around from its current spot at all, so I know it didn't get caught in the powerhead or anything.

Any idea what this could be?

 

[Big G]

Bump

 

[ahiggins]

I wouldn’t be worried about it. It’s not a cut and if it seems healthy and happy, don’t freak out lol nems are weird