Proper Salmon Reviving Method - Pier Fishing

[zippyFX]

Incidentally... I was fishing for moon eye last night and I caught a nice one... During the release I tried to send it down gently (I as 10 ft up) but it flapped it self into a position in which it pancaked when it hit the water.... but it did manage to frantically get to depth... about 5 minutes later I saw it belly up on the bottom. 5 minutes later I saw it being chased by a musky in a bitter dog fight for survival; It was doing well but the musky was not giving up.... I tried casting some lures to get the muskies attention but he was focused on his quarry and would not be distracted....I am not sure how the situation ended.