Price Tag: $50-$150 The brightly colored Discus fish is native to the Amazon River basin in South America but is incredibly popular as a freshwater aquarium fish. "Discus don't cost thousands of ...

In an Australian first, researchers have described a new species of 15-million-year-old fossilized freshwater fish, ...

Discus fish are renowned for their striking ... The Harlequin Rasbora is a small freshwater fish with a distinctive black triangular patch on its orange-red body. This species is native to ...