For the time it takes to tame a high level and for how rare prime fish meat is, I don't see it being worth any time taming as with raw fish meat a 150 would take over 5 hours, just to get organic polymor that makes Gillie suits..
To the people who are annoyed about the fish diet, Pelagornis can float on the water and swim with you on it instead of getting dismounted forcefully like any other flier. They can murder fish that way if you have a few minutes of your time and a good, lively pond or river.
Mine was killed by a Xiph (Ark Additions creature, mod) and she was the best otherwise.. thank you for reading and Midnight also thanks you for taking another one like her! 🪶