So I tried taming a freshly hatched Moonlight dragon and for some reason it won't except any of the fish I give him. I've tried giving him raw salmon and cod, then cooked salmon and cod and for some reason I just can't feed and tame the dragon. Is there something I'm missing or a special taming mechanic for certian dragons I just don't know of? Like everytime I get close to him my character ends up eating the fish and not the dragon and it's really frutsrating. Below I have pictures of the version of the mod I have, thank you.

the moonlight dragon tames by eating shulker shells

you can find info on all dragons here:
https://www.curseforge.com/minecraft/mc-mods/dragon-mounts-even-more-dragons