silhouette spongilla icon. outline logo of seaweed. black simple of coral, water plant or wooden driftwood. flat

alga aquarium background black branchy cartoon clipart contour coral design drawing driftwood emblem flat graphic icon illustration isolated label logo marine natural nature ocean outline pictogram plant porous print ramified ramiform reef sea seaware seaweed sign silhouette simple spongilla spongy spriggy sticker symbol template twiggy underwater vector water white wooden