Seashell

Seashells are decorative items found naturally in the Ocean biome. When placed, they can appear as one of three varieties. They will naturally spawn on Sand Blocks within the biome, both above and underwater, making them a renewable resource.

Trivia

 * The Seashell is the only one out of the three decorative background objects found in the Ocean (the others being Coral and Starfish) whose inventory sprite does not exactly match at least one of the variants when placed. The sprite does somewhat resemble the first variant, as if it would be stuck in the sand tilted to the right.
 * Placed or spawned seashells can share a very similar appearance with Lightning Whelk Shell, Tulip Shell, or Junonia Shell. However, when picked up, they will always remain 'Seashell'.
 * Prior to 1.3.5, Terraria item names used to be stored in separate language files, and the "name" statistic for items were merely internal placeholders. The internal name for Seashells and Starfish was "Beach Stuff."
 * When Seashells and other 'beach material' spawns, it makes an audible 'thump' sound. As they all sound alike, it's impossible to tell what spawned by sound, but you can know it's time to pick something up when you hear it.

History
Coquillage 조개 贝壳