starfish, coral, sea sponge, algae and bubbles. hand drawn graphic in black and white color line art

starfish sea shell coral sponge algae pebbles bubbles illustration animals underwater seashell ocean nature summer beach tropical aquatic nautical aquarium marin vacation marine exotic seaweed spiral mollusc undersea oceanic cockleshell lagoon diving composition vector outline sketch graphic linear ink engraving monochrome etch painted contour