👉 Oleocyst is a term used in the field of biology, specifically in the study of algae. Algae are unicellular organisms that have an extremely large number of cells called chloroplasts within their cell walls. They are responsible for photosynthesis and play a crucial role in marine ecosystems by converting sunlight into food. The presence of oleocysts can be found on the surface of seawater or soil, which is why they are commonly referred to as "ocean algae".