concept of summer poster with sea shell, coral, crab and shrimp empty paper for message.

aquatic background black cockle cockleshell collection conch coral crab crawl decoration design drawing drawn element engraved engraving etched etching graphic illustrated illustration invertebrate isolated lobster marine mollusks nature nautilus object ocean plate print sea sealife seashell seashore shell shrimp silhouette simple single sketch snail spiral summer symbol vintage white