i feel you. the mahi-mahi was easier for me to catch than the giant trevally was (i caught 2-3 mahi-mahis before i caught a giant trevally), but both are definitely pains in the ass. every single time that i got excited over a large and skinny shadow spawning, only for it to be a sea bass, contributed to my villain origin story lol. it’s frustrating as hell, but i believe in you. good luck!