Minecraft wiki entry for Beach, associated text: Beaches are mostly harmless biomes, though don't have many resources of their own other than copper ore which can be found in huge ore veins in this biome. Buried treasure often generates buried under most beaches, and shipwrecks occasionally generate on beaches. Turtles may spawn on some beaches, and are the only passive mobs that can, though other passive mobs frequently wander into beaches from surrounding biomes. Players should be wary of drowned that often spawn in the water surrounding beaches, however, as they could make fighting hostile mobs more challenging. Ocean ruins generated in the ocean nearby may spread onto beaches, causing some ruins to form on land.