The Marine Mammal Center weaning. At the center, they receive specialized veterinary care; diagnosed, treated, rehabilitated, and ideally, released back into the wild. Animals in need of assistance are usually identified by a member of the public who has contacted the center. These animals represent the following major species: California sea lion, northern elephant seal, Pacific harbor seal, northern fur seal, and the southern sea otter. On a few occasions, the Marine Mammal Center has taken in Guadeloupe fur seals, Steller sea lions, and bottlenose/Pacific white-sided dolphins. The only non-mammals that the center takes in are sea turtles. The research team consists of veterinarians
The Marine Mammal Center operating budget came from private donations and individual and family memberships. The Marine Mammal Center presently has a paid staff of 45 individuals. Its operation is reliant on several hundred volunteers who are trained in rescue, release, animal care, and education. The main facility in Sausalito can accommodate approximately 1,200 animals a year; although a typical year brings between 600-800 patient. In 2009, a lack of available fish related to the El Nino weather pattern brought 1,750 patients to the Marine Mammal Center, more than in any other year since it opened. 2012 marked the year with the highest percentage