Random aggression in goby?

[Jacob Hill-Legion Aquatics]

I have this blue neon stiphodon goby and he’s always been super calm and never has shown aggression, he even is sometimes a bit scared of my white cloud minnows but the other day I noticed he was chasing the white clouds away if they swim close to the bottom of the tank. 

any idea of why he would be doing this now after being peaceful for so long?

But he’s not terrorizing the fish and just kind of scaring them off his territory.

Edited July 21, 2022 by Jacob Hill-Legion Aquatics

[Fish Folk]

On 7/20/2022 at 10:23 PM, Jacob Hill-Legion Aquatics said:

I have this blue neon stiphodon goby and he’s always been super calm and never has shown aggression, he even is sometimes a bit scared of my white cloud minnows but the other day I noticed he was chasing the white clouds away if they swim close to the bottom of the tank. 

any idea of why he would be doing this now after being peaceful for so long?

But he’s not terrorizing the fish and just kind of scaring them off his territory.

As they mature, I think they often  increase aggression and territorial tendencies.