Lack of Biome specific Animals and Mobs

I’ve played Minecraft for as Long as I can remember and just as an example Savana Biomes have never offered anything special. They need animals to show how intresting the game really is. And that is just 1 biome. Perhaps for oceans we can have illager pirates on massive boats. Perhaps we can get some new biome specific weapons and structures for the mobs. Bring in mobs from dungeons and legends to really embrace the mobs of Minecraft. In my opinion riding an elephant while using turtle armor with special turtle armor buffs while wielding a trident would be the best but we need more mobs and more varients of weapons and monsters.