Mermaid Silena's adventures

Time passed, Silena grew up and after school she entered the Maritime Pacific University at the research department "Human Impact on the Marine Environment". She liked this topic very much, and the story of shipwrecks was told by a very interesting catfish with a big gray mustache, and this catfish was a witness to none of these wrecks. Therefore, she especially adored this subject. Som and his students visited one sunken ship.