glowing jack-o'-lantern undersea in a halloween-themed underwater setting

halloween autumn fall underwater pumpkin glowing spooky dark eerie sea ocean deep water scary creepy mysterious fantasy surreal night aquatic marine seabed coral reef kelp seaweed plants foliage nighttime bioluminescent october holiday festivities carving light shadow bottom mystical magical hidden secret nature wildlife oceanic environment silhouette submerged bizarre jack-o#39aph39#-lantern undersea halloween-themed setting setting generative