Turtle island

This would be an incredibly rare animal appearing exclusively in the ocean biomes. It’s essentially a giant turtle that acts like a small wandering island that can have different trees and blocks and stuff on it. If it is killed, all of the blocks previously on the turtle would drop down into the ocean or just break. I think that it’s a cool idea because it’s like a mix of a biome and an animal. They wouldn’t be able to breed or be controlled like a horse, tho technically it would be rideable. It’s inspired by cultures that believe the earth is all on the back of a turtle. It would be cool to be able to just hop on a small island and just chill there and let the turtle take you where it may, or place a bed on the turtle and fall asleep and suddenly wake up on a different place on the map! It could also be interesting to only have 1 per world that respawns all over the place, and you could build on top of the turtle. Then if you’re off on an adventure and you get too far away from your house, you could build a little house with a bed on your turtle and make that a little rest stop or even a permanent home! I don’t know if it would be possible to name the turtle in game with a tag, but if you could that would be fun! These are just some ideas I’ve had, and if anyone wants to add or change something in a comment, be my guest!