Find the Angler Fish Light

You happen to be a sea diver and you have dived deep under the sea many times even before this. There you have a met an Angler Fish who has become your dear friend. One day when you dive again to go and meet that friend living in the sea, you come to know that his esca, the fleshy thing on his forehead is cut while fighting with another sea creature. He used to attract prey using his esca but he cannot do it anymore. He is blind and you cannot leave him in this state without helping. Start searching for clues and start solving puzzles that will help the fish get back its lost light.