It looks like a saltwater bay standing at its bank (i.e. levee).
|Deep Lake looks pond like|
despite boasting a 90 foot depth
But modestly sized Deep Lake in Big Cypress Nat'l Preserve is 5 times deeper, despite being on the order of what many people would call a pond. The reason it's not a pond is the same reason that nearby Turner River is not called a Creek.
Hint: Think big fish in small pond.
|Lake Okeechobee looks like a bay|
but is less than 20 feet deep