The Marine Mammal Center is located in Sausalito, California. The principal vocation of this center is to rescue and nurse back to health marine mammals like elephant seals, sea lions and harbour seals. Volunteers who work at the Marine Mammal Center have an important job; they have to save seals that are malnourished, injured, have physical abnormalities or are affected by domoic acid that comes from phytoplankton. At least 50% of the seals at the mammal center survive. However, When seals cannot survive on there own or when they are too sick, veterinarians have end there lives through euthanasia. The Center wants sea lions and all other marine mammals to return, as soon as possible the ocean because they don’t want them to get used to humans. Because of this kind of hospital, injured marine mammals are now very likely to survive. It’s also important to note that this center makes a good contribution to field of science because of the satellite they put on the mammal’s head when they leave the Center. With this strange thing, they can inspect the seals’ movements in the ocean and find out what kind of toxic products are harming them.