👉 In biology, a procellarid is a type of algae that grows on rocks or other surfaces. These algal species are known for their ability to form large colonies and can produce a wide range of compounds, including enzymes and pigments, which are used in various biological processes. Procellariids play an important role in the formation and maintenance of certain ecosystems. They are often found in areas with high levels of UV radiation or other environmental conditions that promote algal growth. Procellari