Lots of eels and similar fish travel over land. In Australia Longfin Eels are so absurdly hardy and adaptable and travel such great distances land that they live in just about every single body of water the size of a pond and larger that isn't surrounded by kilometers of desert. They also sometimes get locked in these locations and can't go to the ocean to breed (they die like salmon when they do) so they grow from the normal eel size of a meter to a meter and a bit to nearly 3m long. Pick related is a gigantic one cut in two