Is there any danger from marine life such as sharks, barracudas, or jellyfish while swimming in the waters of the Sanctuary?
While there are not many incidents of altercations between marine life and humans in the Keys the potential is always there. It is the Atlantic Ocean and there are sharks, eels, barracudas, urchins, jellyfish, fire coral and other flora and fauna that could cause injury to snorkelers, divers, and fishers. When in the water it is always important to pay attention to your surroundings and not provoke any animal to use its defensive behavior (i.e. sticking your hand into a hole that might have an eel in it). Millions of people dive and snorkel in the Florida Keys each year with no problem.