seaweeds, coral black and white . pink agar agar seaweed, phyllophora hand drawn ink

illustration ocean agar flora phyllophora sea plant seaweed nature background marine undersea underwater isolated kelp drawn art aquarium deep aquatic weed white seafood alga laminaria superfood chlorella coral porphyria silhouette doodle line natural graphic design sketch ink contour black vector drawing artwork etch simple outline monochrome linear coloring painted hand