Though swimming is permitted, scuba diving is highly prohibited as the bottom layer of the lake hosts a poisonous hydrogen sulfide gas that even the lake's jellyfish don't swim near.
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Though swimming is permitted, scuba diving is highly prohibited as the bottom layer of the lake hosts a poisonous hydrogen sulfide gas that even the lake's jellyfish don't swim near.
However, scuba diving in the lake is forbidden for two reasons: First, to protect the jellyfish, as the bubbles are likely to get caught under the bells. Second, about 15m (16.4 yds.) below the surface, there are high concentrations of lethal hydrogen sulphide, which can be absorbed through the skin.
Talk to lifeguards, local residents or officials with a local health department before swimming or diving in coastal waters, especially in areas where jellyfish are common. Avoid water during jellyfish season. Stay out of the water in jellyfish areas when jellyfish numbers are high.
All visitors are required to purchase a 10-day Rock Island Permit for 100 USD (50 USD if you access the Rock Islands but not the Jellyfish Lake). Take also into consideration that if you are planning to book a day tour to the Jellyfish Lake expect to pay between 100-250 USD (excluding permit costs).
Ingraham Lake, FloridaEverglades National Park is home to around 75% of the estimated crocodiles in South Florida, and Ingraham Lake is the southernmost lake in the continental United States, measuring less than 1,000 acres (4 km2).