Niger Trigger behavior question

[GreatHammerhead]

Hey guys! I’ve got a Niger trigger in my reef tank(he’s a model citizen) I feed 3-4 times a day and he stays happy. I’ve noticed lately he will periodically swim up against my giant toadstool. It almost looks like he’s scratching but he’s never done it against the rocks which fish typically do when scratching. Anyone have any expiernce in this?

 

[GreatHammerhead]

Hey guys! I’ve got a Niger trigger in my reef tank(he’s a model citizen) I feed 3-4 times a day and he stays happy. I’ve noticed lately he will periodically swim up against my giant toadstool. It almost looks like he’s scratching but he’s never done it against the rocks which fish typically do when scratching. Anyone have any expiernce in this?