In this picture provided by the Institute of Marine Science water turns red with blood as dolphins lie on the shore in Zanzibar, Saturday, April 29, 2006. Scientists worked Saturday to determine why hundreds of dolphins were stranded in shallow waters and later washed up dead along the shore of a popular tourists destination in Zanzibar's northern coast. Villagers and fishermen buried the remains of some 400 bottleneck dolphins _ which live in deep offshore waters _ whose carcasses washed up on Friday along a 4-kilometer (2.5-mile) stretch between Kendwa and Nungwi. (AP Photo/Institute of Marine Science, University of Dar es Salaam)