New mob in the water

Hello Mojang! I am a Korean player who loves Minecraft. I propose a new wild update that adds realistic and unique animal behaviors to the Overworld. DEEP SEA & OCEAN Leatherback Turtle (Giant Mob): Armed with 100 HP. They are neutral (passive in Peaceful) and inflict Slowness II for 5s when attacking. They breed with Pufferfish. Guiding them to shipwrecks grants a rare Turtle Banner Pattern for shields. Barnacles & Wax: Parasitic Barnacles attach to Leatherbacks, slowing them. Players can craft toxic wax (Pufferfish + Honeycomb) to coat the shell, making it immune to Barnacles and poisoning attacking monsters. Cubic Jellyfish: Translucent blue, cube-shaped mobs. They float peacefully and don't chase players, but brushing against them inflicts a brief Poison status. Leatherbacks hunt them. Sea Otter: Cute mobs that swim with pebbles. Their main food is Barnacles. They naturally swim to Leatherbacks to clean and eat Barnacles off their shells.