Sometimes photo-ID is hard, even when you know what pod the whale belongs to.

AP pod’s ID photos were taken 6 years ago. The calves at the time were documented but the saddle patches of young killer whales are often faint and difficult to make out. Those same calves are now juveniles and are much more distinct, but unfortunately matching tbem to their calf ID photos is proving to be a challenge.

Photos from the North Gulf Oceanic Society.

I believe this is AP15 based on the dorsal fin curvature, but I am not 100% sure!