Fishes Which Can Swim Backwards
Betta Fish Fish are often "seen as low-maintenance pets" until people realize just how much work needs to be put into them, says Christopher Adams, founder of ModestFish. However, that's usually because they pick the wrong kinds of fish: If you're looking for a low-maintenance fish, go betta.
Damsel Fish Damsel Fish are small, colorful marine fish that are known for their aggressive behavior. They can swiftly swim backwards with ease.
Dorsigera Fish Dorsigera Fish, also known as “Red Breast Acara,” are a freshwater fish found in South America. They can swim backward too!
Blenny Fish Blenny Fish are a family of small, colorful, marine fish known for their interesting behavior, and they can swim backward.
Triggerfish Triggerfish are a family of brightly colored marine fish that can swim backward as well as forward.
Blue Gill Sun Fish Blue Gill Sun Fish are a species of freshwater fish found in North America. They use their various flexible fins to swim backwards.
Black Ghost Knife Fish Black Ghost Knife Fish are a species of freshwater fish native to South America. They are nocturnal and can swim backward. I have personally kept them in my home aquariums, and I can say firsthand that watching them swim backward is truly a great sight to behold!
Eels Eels are a long, snake-like fish that can swim backward by reversing the direction of their entire body.