What do you think is in the river?!

A husband and wife were on their boat in the waters of the St. Johns River (Florida) intent on throwing away the water accumulated on the boat after a violent thunderstorm. 

However, at the first bucket of water that was thrown, they witnessed an unexpected phenomenon! As soon as the water comes into contact with the surface of the river, something beneath it begins to move vigorously!

What is this all about? It is only a herd of manatees aka sea cows!