Just-In OCEAN

 The simple mod to add a material similiar to netherite,but it apear on sea bed of the deep ocean. You need to dive in the ocean to find it.  New mob "Sharkdrake" the apex predators of the sea, they swim at incredible speeds. Some rare individuals have shark fins. Weapons made from their fins can increase swimming speed.  And you can use the waterspirit ingot and smithing template to upgrade the equipment. More water spirit weapon with [Just-In CAVE](https://modrinth.com/mod/just-in-cave).