Discus fish are admired for their vibrant and varied color patterns. These freshwater fish from the Amazon Basin can change their coloration based on mood, health, and environmental factors.

Scientists named the fish after Frodo because the fish, like the character, is a "diminutive traveler," according to Yahoo News. Hobbits, of course, are known to be small in stature.

A new species of fish has been discovered in the Amazon: a piranha relative with humanlike teeth. The eye-catcher was named after a “Lord of the Rings” villain.