Glass paintings with oil and acrylic by Abe V Rotor.
Red seaweeds are macro algae that live among coral reefs in tropical seas. There are three main divisions of macro algae according to color and habitat. The red ones occupy the deepest part of the reef, while the green ones (Chlorophyta) thrive in the shallow portion. In between the two groups are the brown ones (Phaeophyta) to which Sargassum is the most popular. The red pigment plays an important role in capturing solar energy, for which reason rhodophytes can thrive to as far as sunlight can penetrate.