More than 15 fish species in the Indian River Lagoon may have mercury levels that could harm people who eat more than two or three 8-ounce fish meals a month. Mercury enters the environment through air pollution from coal-burning power plants, incinerators, mining and other sources. Rain takes the mercury to lakes, rivers and the ocean, where microorganisms transform it into methylmercury, a dangerous form of mercury. It travels up the fish food chain getting more concentrated. Long-term studies reveal people who ingest low doses of mercury over a long time have slower reflexes, reduced coordination and poor vision. National Academy of Sciences reported 60,000 pregnant women risk neurological damage to their fetuses because of mercury. The Food and Drug Administration issued a warning for pregnant women not to eat shark, swordfish, king mackerel or tilefish last year. Tuna, a high mercury containing fish, was left out. Environmentalists accused federal officials of giving into the tuna industry. Florida wasn’t among the eight states issuing warnings for pregnant women and young children to limit tuna meals to one can per week. The FDA stopped monitoring mercury levels in commercial fish several years ago, despite findings that mercury in tuna, swordfish and shark exceed safe levels. State tests show fish like red grouper and spotted seatrout in the Indian River Lagoon may exceed 0.24 parts per million, limiting meals to less than three a month. State officials have had an advisory in effect for limiting consumption of jack crevalle and lady fish since 1995 in the Lagoon. Adults limit intake to one meal a week and women of childbearing age and children to one meal a month. The biggest source of mercury pollution is coal-burning power plants. Recently the Bush Administration proposed the Clear Skies Initiative, which environmentalists have criticized for lack of limits on mercury pollution