Seashell Caves

These caves would be themed after Floridian caves. These caves would be solely made of limestone, and if the player is lucky they would be able to find little crevices of fossilized seashells that they could either use as a decoration, or as a resource in the upcoming archaeology system as a possible upgrade to the brush. Archaeological sites would spawn in these caves, and the loot you get from them will be themed around the ancient oceanic past of this planet. These caves would spawn either on beaches, oceans, or deserts, or any other biome that is predominantly sand or ancient (badlands, as an example) and would be exclusive to these few types of biomes. In the archaeological sites the player would also be able to find a chestplate that is made out of seashells, and if the player is wearing it would give as much armor as an iron chestplate would, but would give the player additional speed underwater (think of it like having a less effective dolphins grace, but permanent!)

Maybe a few mobs from Minecraft Dungeons or Minecraft Earth would also be able to spawn in these caves (tropical slimes, wavewhisperers, and clams)

It would be very poggers if you developers added this to the game :D