Shark model for axolotl mob in 1.20

[mental horizon]

I found an old small resource pack which changes dolphins into sharks. I was already planning to add sharks to the game with using data pack/resource pack combination but I want sharks as an aggressive mob. Dolphins are not attacking players and fishes and that's why I want to change the model from dolphin to Axolotls. But when I tried the change it, the model is going to break and it does not work. If you help me for to fix the model, I will be so happy. Thank you...

The broken models

This is (jem) in minecraft-optifine-cem folder

And this is (png) in minecraf-textures-entity-axolotl folder

This works for dolphin but is not working for axolotl. I want to change it to work for axolotl aswell so I can make an aggressive shark with making axolotls attack for players too using a data pack

[harsh portal]

hmm if it works for dolphins but not for axolotls it might as well be a problem with optifine

not sure since I'm not really experienced with that tho