Is this normal behavior for bettas when introduced with Pygmy corys

Hi I’m new here and I was just wondering if this was normal behavior for a betta when being introduced to new fish in its tank I made sure to take him out of the tank when introducing pygmies into the tank I also rearranged the tank to make it seem it’s not his regular home but I’ve seen him chase the pygmies for like 2 seconds and then leave them alone I’ve also seen some fin nipping if you can call it that and I was just concerned if I should separate them from my betta