Fat Green Fish are enemies in Donkey Kong Country: Tropical Freeze. They only appear in the level Twilight Terror. They will occasionally leap out of the water at Donkey Kong, trying to make him crash his rocket barrel. At some point in the level they will stop appearing and will be replaced by Big Sphens. They are not encountered in any other levels.
They are fat and green, with small white eyes surrounded by a blue ring. They have fat, blue lips and a small blue fin on top of their body. Their undersides are white. They will only rise up to about halfway up the screen before falling back into the water.