The World Needs More Manatees | STUFF YOU SHOULD KNOW
Why Lack of Blubber Forces Winter Migrations
Despite their round appearance, manatees have no blubber and cannot tolerate water colder than 68 degrees Fahrenheit for long. To survive winter, the Florida subspecies gathers in natural warm springs like Blue Spring State Park, where water stays around 72 degrees, or near warm power plant outfalls. Genetic testing indicates the current Florida population migrated from the Caribbean roughly 12,000 years ago after the last ice age.
Slow Metabolism and Continuous Molar Replacement
Manatees are strict herbivores that spend up to eight hours a day eating roughly 10% of their body weight in seagrass. Josh explains that their extremely slow metabolism prevents overheating in tropical waters but leaves them unable to burn enough energy to warm up in cold water. Because sandy seagrass wears down their teeth, manatees continuously grow replacement molars from the back of their jaws throughout their lives, a trait shared with elephants.
Why Touching Curious Manatees Endangers Them
Josh points out that manatees are rare among non-apex native species in having no natural predators, leaving them unafraid and curious around kayaks and swimmers. While federal guidelines allow open-hand touching if a manatee approaches first, conservationists strongly oppose any contact. Josh warns that human interaction and feeding cause unnatural habituation, risk disease transmission, and put swimmers in danger of accidental injury from a 3,500-pound animal.
2017 Delisting and the 2021 Mass Starvation Event
In 2017, federal authorities downgraded manatees from endangered to threatened over objections from the Save the Manatee Club, which called the decision flagrantly inexcusable. Four years later, in 2021, an unusual mortality event killed 1,255 manatees from starvation along Florida's east coast—roughly an eighth of the state's population—yet the species was not returned to the endangered list. Chuck notes that while manatees can live 60 years, human impacts reduce their wild lifespan to around 10 years.
Pollution Wiped Out 90% of Indian River Seagrass
Drawing on his years living on the Indian River Lagoon, Josh explains how nitrogen fertilizer runoff, leaking sewage, and aerospace pollution trigger annual algae blooms that block sunlight and kill aquatic plants. Over 15 to 20 years, the lagoon lost 90% of its seagrass, directly driving the 2021 starvation crisis in waters that were crystal clear in the 1960s. However, recent state intervention has allowed seagrass in some areas to rebound by up to 75% over five years.
Save the Manatee Club and Boater Safety Measures
Chuck highlights the Save the Manatee Club, founded in 1981 by Jimmy Buffett and former Florida Governor Bob Graham, noting its four-out-of-four Charity Navigator rating with 85% of funds going directly to programs. Josh emphasizes that boaters play a vital role by slowing down in shallow waters, since propeller strikes are so common that researchers identify individual manatees by their back scar patterns. Witnessed injuries or orphaned calves should be reported to Florida Fish and Wildlife.





























