Lava Sharks

I have an idea for a new mob to be added. The lava shark. This mob can only be found in the lava lakes in the Nether. It's typically  found by riding a strider in the lava until a lava shark spawn. The lava sharks can drop shark scales and when you get 4 scales you can craft them with ancient debris (almost the exact same recipe as a netherite ingot) to get a piece of scalemail. You can use the scalemail in a smithing table with the Scale upgrade smithing template to upgrade your armor to Scalemail armor and it gives the wearer a permanent fire resistance. However the durability would also get depleted as you swim in armor, sort of like how soul speed boots loose durability when running on soul sand. Anyways I know this would typically be a huge update, but I feel like this would be a nice change to the nether and force some interactions with the striders which I feel get overlooked.