9. Snakehead Fish
The snakehead fish is a predatory fish that has been found all over Africa and Asia and its size can range from under a foot to as big as the large beast pictured above. These terrifying creatures have even been known to venture out of the water onto land in search of food and can survive like that for up to four days. These fish have become illegal to own in many US states and are considered a destructive species because of how aggressive they are.