The classes aim to familiarize participants with the ecosystem of the Bay of Puck, which as a valuable natural reservoir, has become the first protected marine area in Poland. Inner Puck Bay has excellent conditions for the development of life on the bottom and in the water, because it is characterized by a small depth and low impact of open sea waters. These factors influenced the development of rich plant and animal assemblies, and as a result the creation of the reservoir that distinguishes the greatest biodiversity in the entire Polish coastal zone.