Creativerse Seashells100
Creativerse Seashells10010
Creativerse Shore1180
Creativerse Seashells at pond in Savannah110
Creativerse Seashells sandy islands Ocean100
Creativerse seashells sand-pit3888
Creativerse Seashells first0011

Seashells could be found at any Shore made of Sand close to Water and in Dunes.

More seashells will spawn one after another over time on Sand blocks during your gameplay, and even faster whenever your player-character is in range of view.

This way you can also make seashells spawn on artificial biomes made of Sand, as long as Water is close enough. They occasionally also can spawn on Sand if no Water is near, but more sparely.

Apart from being fine decorations for your home (except if you also use blocks crafted from obsidian and blocks of sand, which might invite unexpected visitors, such as Rocksters, Rockzillas or Pebbles), you will need seashells to unlock the crafting recipe for Iron Mining Cells and to craft them.

You might also want to collect seashells to craft Sand Castle Wall building-blocks after finding the rare crafting Recipe for those in Treasure Chests.

Additionally to that, seashells are an ingredient of Opalescent Ceramic Wall blocks. You can find the crafting recipe for these small-tiled building-blocks in the Store as a part of the "Ceramic Pack" that you can buy if you want to support the game's development.