The giant freshwater stingray may be the ... The rays have also been targeted for the burgeoning aquarium trade, though it is now illegal to fish for stingrays in Thailand.
Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world," PetMD reports. Native to southeast Asia, this species is known for its range of vibrant hues.
As far as fish go, the Asian arowana is one of the most expensive aquarium species sold in the pet trade. It is a freshwater fish that has people paying in the tens of thousands of dollars for the ...