the black outline of the octopus is drawn with lines of different widths. logo of the octopus cephalopod mollusk

abstract animal aquatic art background black cephalopod character contour cuttlefish danger design different drawn element emblem feeler fish flat food giant graphic icon illustration invertebrate isolated life lines logo logotype marine mollusk monster nature ocean octopus outline sea seafood shape silhouette spiral squid swimming swirl symbol tattoo tentacle underwater vector water widths wild wildlife