Hans Christian Andersen, a Danish author, enjoys a remarkable reputation among nineteenth-century writers of children’s literature. He is particularly remembered for his literary fairy tales such as "The Little Mermaid," "The Nightingale," "Thumbelina," etc., which continue to be read and enjoyed even in the twenty-first century. AlifLaila is a platform that strives hard to pass on such literature to the new generation. The stories are translated into Urdu to make it easier for children to access Urdu literature. "The Great Sea-Serpent" is one such interesting story that has been translated into Urdu. The story is about a little sea creature who had eighteen hundred brothers and sisters. They were unaware of their parents. One day, something attacked the marine life. What was that thing? Was it a shark or some other marine creature? Have humans introduced such things into the sea that can raise questions in the minds of the sea inhabitants? Was the little fish successful in solving this mystery? Read this fascinating story to learn about marine life.