YooHoo & Friends S02E29 - Dark Spring in the Ocean

Yoohoo and his friends have gone to play in the ocean. They meet a squid and learn there is a black spring inside the ocean. Oops and Koops overhear this and tells Big Boss about the black spring. Big Boss orders them to search for the black spring since it may be where the oil spring lies. Oops and Koops find the ocean's black spring and unplugs the entrance.