Sea grasses stabilize sea beds and protect shorelines from erosion by absorbing energy from waves. Shrimp, spiny lobsters, and sea urchins live in and among the grasses and feed on phytoplankton; they in turn feed larger predators such as sharks, rays, barracuda, and king mackerel (Scomberomorus cavalla).[77] Due to shallow water and abundant sunlight, Florida Bay hosts communities of coral reefs and sponges, although the majority of the state's reefs are closer to the Florida Keys.[78] Everglades keys that foster mangroves also support nurseries for wading birds such as the Great blue heron (Ardea herodias), which was almost wiped out in the Labor Day Hurricane of 1935 (only 146 were counted afterward).[79] After recovering to number more than 2,000, they were further endangered by Hurricane Donna in 1960, which decreased their numbers by 35 to 40 percent.[80]