The Marine Research Lab is a location from The Legend of Zelda: Majora's Mask. It is located just off Great Bay Coast, sticking out of the water with the help of support pillars. The laboratory is dedicated to the study of marine biology and is run by the Professor. Inside the Marine Research Lab is also a tank with two fish, being raised to help feed the Zoras, as the number of fish in the bay is dwindling. If Link feeds one of them four fish, the larger one will eat the other and spit out a Piece of Heart.