A Note Before You Begin

This book is about crocodilians. That word covers an entire ancient family — crocodiles, alligators, caimans and gharials — but in the United States it comes down to two animals, and those two are the heart of this book: the American alligator and the American crocodile. So whenever you read “crocodilians” in these pages, picture those two, even though the family is far larger. It is written for the people who share territory with them: who live, work, fish, hike and vacation in the country these animals call home. You can share the water with them from a boat — but you must never share it with your body. There is no place and no moment where it is safe to have your body in the water at the same time as one of these animals. You will sometimes see a trained professional appear to break this rule — people like Chris Gillette, a Citadel Culebra faculty member who has spent more than twenty-five years working with alligators, at times in the water beside them. It only looks like a contradiction. Handlers like Chris understand these animals at a level almost no one else ever will, and what you are watching is decades of hard-won skill and carefully managed risk, not a safe activity anyone can copy. For every ordinary person, without that training, the rule stays absolute: your body never shares the water with a crocodilian, ever. They differ in size, in temper, and in name — but the one rule that keeps you alive never changes, wherever you are and whichever one you face: stay out of their reach.

This book was finished in the days after two deaths, barely forty-eight hours apart, on opposite shores of one sea. On 26 June 2026 a twenty-eight-year-old man, Irving Mauricio, was taken by an American crocodile off a marina beach in Puerto Vallarta, Mexico. On 28 June a thirty-one-year-old woman, Brittany Clark, died after an alligator seized her in about three feet of calm river water in central Florida. Neither animal was a monster. Each did exactly what its kind has done for millions of years, in water that people had come to think of as ordinary. This book is written so that fewer families have to learn, the hardest way, what these animals are and what they can do.

Its focus is the crocodilians of the Americas — the American alligator of the United States, and the American crocodile that ranges from the tip of Florida through Mexico and Central America. These are the animals that share more water’s edge with more people every year: in backyards and canals, on golf courses and lake shores, along marina beaches and mangrove coasts. The wider world’s crocodiles appear in these pages too — including the true man-eaters of Africa and Asia — but the heart of this book is the two that Americans and their neighbors actually live beside.

It carries one message above all others, and that message is simple enough to teach a five-year-old: in alligator and crocodile country, you cannot tell by looking whether the water is safe. The most important skill you will ever learn is not how to fight one of these animals, or how to spot one, or how to outrun one. It is how to behave so that you are never tested at all.

Across every place these animals live, the official safety message is the same, and it is short and absolute: assume that any natural body of water in alligator or crocodile country may hold a large, dangerous animal, and only enter or swim where there is a sign telling you it is safe. Florida’s wildlife agency says exactly this, and Australia’s Northern Territory built an entire public campaign — “Be Crocwise” — around the very same idea. Everything in this book is built on it.

You will also find, woven through these pages, an argument that goes beyond safety. It is the belief that crocodilians are not monsters to be removed from a tidied-up world, but magnificent survivors that have earned their place — and that learning to live alongside them is not a burden but a responsibility, one that falls to us precisely because we are the species clever enough to choose how the story ends.

The one rule that matters most

If a waterway is not signposted as a designated safe swimming area, treat it as crocodilian habitat. No exceptions. Not the clear ones, not the shallow ones, not the ones the locals “always” swim in, not the ones that looked fine yesterday.