chlorella watercolor featuring small green algae clusters with yellow centers, perfect for environmental-themed s

chlorella algae green cell watercolor food seafood superfood seaweed supplement alternative antioxidant chlorophyll medicine aquarium aquatic underwater marine microalgae single freshwater illustration clipart dietary bloom detox biological alga microscopic group cluster composition nutrition unicellular spirulina laminaria kelp sea water ocean plant organic biochemistry biodiversity biosynthesis environmental microbiology vegan yellow nucleus