In the fourth part of the game Coloring Underwater World 4, we will again go to the amazing underwater world where a lot of fish species live. Before you will be seen a book coloring in which all the pictures will be black and white. You will have to make them colorful. To do this, there is a special panel on which will be placed pencils, paints with brushes and an eraser for mashing. All these subjects you will have to use to colorize the pictures. Just imagine in the imagination how you would like them to look and then taking the brushes start painting the pictures.