The rule it takes 50 photos to get a good one still applies.
I have a dedicated fishing camera on a lanyard, and it's all worked into a sweeping process of turn it on, first time the line can be released, maybe quick snap of the rod,
likewise, a quick not-really-framed shot of the fish is part of handling the fish to release it, and takes no more than 2 seconds. The photo will get rotated, framed and cropped later at the computer.
The moments frozen in time are just that - in spite of occasional protests from people without the honed skill, likely (very, probably, certainly) without imagination, and who Really don't get it, no fish were abused in taking these photos.
Nothing is still in the process of taking photos, especially not me and the fish - the only thing still is the photo - everything about taking the photo was dynamic. As soon as the shutter button clicks, the waterproof camera on a lanyard is simply dropped.
Phone cameras are probably the worst for doing this, aside from being slow, there's a good chance you're going to be more concerned about the condition of the phone than the condition of the fish.
Need more to get that 50th photo? Catch more fish.
about the time the fish is swimming away, the camera is turned off and returned to a shirt pocket
the reel photos were taken with a tripod and a different process altogether, hopefully without many wasted electrons, though still framed and cropped at the computer