coral pipe sponge icon. hand drawn black and white doodle, sketch. ocean animal, coral reef silhouette. tropical sea

coral pipe sponge doodle vector ocean tube isolated black white outline sketch line monochrome silhouette sea reef underwater aquarium water aquatic deep fauna design children engraving animal graphic ink drawing exotic lagoon undersea anemone etching contour wildlife cartoon tropical object clip art creature cut marine simplicity hand drawn mineral element