Betta fish are very intelligent. They have been known to be able to recognize their owners. There are even some Betta fish that can do tricks like pushing a tiny ball through a ring using their nose. This is something that most fish are incapable of.
A fish at the Vancouver Aquarium was given a prosthetic eye so it wouldn’t be bullied by other fish.
In the 17th century, the Roman Catholic Church ruled that beavers were fish and could be eaten on Fridays.
Some lakes are stocked with fish by dropping hundreds of fish out of an airplane flying over.
In 2012, NYU-Poly constructed a robotic fish and placed it in a tank of golden shiners. After simulating the tail movements of a leader fish, the robotic fish was eventually accepted and became their leader.
Fish do not have a 3 second memory – They can be taught to evade a trap and will remember how to do so a year later.
Finding Nemo had the opposite effect that was intended. Despite its negative portrayal of keeping fish in aquariums, the use of clownfish prompted the demand for aquariums to triple. Demand was met by large-scale harvesting of tropical fish from the wild which devastated Clownfish Populations.
Lemon juice makes fish taste and smell less ‘fishy’ because its acid neutralizes a chemical group in the fish called amines, making them non-volatile and stopping the smell.
There are fish that live under Antarctica, beneath 740 meters of ice in a 10-meter-deep section of water. Scientists are still unsure on how they manage to sustain themselves.
When Anglerfish mate, they melt into each other and share their bodies forever. If a male finds a female, he latches on and fuses to her, losing his internal organs until they share a bloodstream.