Kurasu(Krahs) is a half Blue Pointer(short-fin Mako) half great White shark who was captured after his friend Blue's was taken from him. He was then genetically altered to by scientists in charge of something called the "Sencha" project. Kurasu escaped the laboratory when he was young and met a girl named Kirsten at library. Kirsten's mother adopted Kurasu into the family and there he stayed for 5 years. Then a masked man with a gun looking for Kurasu attacked Kirsten's mother and Kurasu opt to leave for his family's safety and began his adventures as Cowboy Shark! Join Kurasu and his Penguin sidekick Billy as they defeat evil, uncover secrets and half an awesome time while doing it!