Freshwater Polka Dot Stingray

The most expensive tropical fish on our list today is the Freshwater Polka Dot Stingray. Did you know that this black and white stingray originally went for $100,000? The exorbitant price tag is due in part to the fact that exporting them from Brazil's Xingu river region is now forbidden.

The most expensive Freshwater Polka Dot Stingray was a genetically altered type with a U-shaped head rather than a regular round shape. The fish had to be hand-fed, which was unusual. If the fish were released into the wild, they would have no chance of survival.

The fact that this stingray is a freshwater species, as opposed to most others, adds to the fish's uniqueness. Polka Dot Stingrays often have oval, black bodies covered in white spots. The underside, on the other hand, is grayish with no markings. The eyeballs protrude somewhat, allowing them to easily observe what's above them.

These fish have particular sensing organs around their noses and mouths that allow them to sense electric fields generated by other fish. They have powerful jaws that they utilize to consume prey - shells, bones, and all. And, of course, they have a deadly barb along their tail to discourage predators.

Freshwater Polka Dot Stingray is among the most dangerous aquatic creatures. As a result, they are frequently kept alone in aquariums.

Price: $100,000