Remove the rideable feature of the nautilus and zombie nautilus

F of all, nautiluses, like dolphins, are both vulnerable species, and allowing players to ride them in the game is a form of violence. Why is it acceptable to protect dolphins but ignore nautiluses?

Secondly, I think the zombie nautilus is unnecessary. The Drowned Knight could be designed to ride a normal nautilus, just like the Chicken Knight.

Finally, the Little nautilus can be designed to help players dig for Ceramic shards hidden in Suspicious sand and Suspicious gravel within the ruins after being fed pufferfish by the players. It's equivalent to a flexible brush. When the giant nautilus is near the player and tamed, it will give the player effects just like before.