This video is a cartoon animation featuring a mouse character wearing a diving suit and goggles. The mouse is swimming underwater in a vibrant and colorful ocean environment. The ocean floor is covered with coral and sea plants, and there are various sea creatures swimming around. The mouse character appears to be exploring the underwater world, moving around the coral and sea plants, and interacting with the sea creatures. The animation is bright and colorful, with a playful and whimsical style.