👉 Psammolycus is a type of algae that grows in the top layer of the ocean, typically found near the surface and sometimes at the bottom. These algal mats are characterized by their high pigmentation, which can range from light brown to deep blue depending on the species. Psammolycus is an important component of marine ecosystems, providing a source of nutrients for a variety of marine organisms and supporting the growth of other algae and plants in the ocean floor.