"There was a crocodile in the water and our captain tried to maneuver the boat, make a U-turn almost, but he didn't succeed and he tried to make another U-turn to go back to where we were coming from ...

First detected in South Florida in the early 2000s, the sleek, snake-like fish — likely introduced through live food markets from Southeast Asia — now glide through the Everglades marshes as if they ...