If you see a lone tetra hanging by the side of the tank or swimming on its own outside the group, it is likely sick or injured. Just as you might suspect, your pet fish may be feeling unwell if it ...

into my brand-new pond with my PET MEGA PIRANHAS ... I’ve created for these incredible fish at Chandler’s Wild Life’s new home. Watch as I swim alongside these fascinating predators ...

When dorm fish get left behind at the end of the academic year, RAs have been known to adopt them as residence hall pets.

These are better known as Siamese Fighting fish, and while one may be hypnotic and mesmerising, they are tricky to keep and ...

WATCH: Scientists film a species of snailfish swimming at an extraordinary depth, seen here in the first 15 seconds (later fish are at a slightly shallower depth) UWA/Caladan Oceanic Scientists ...

Its owner said the fish was stuck at the bottom of the tank because its swim bladder was damaged. The floating harness is made of twist ties and pieces of cork. Swim bladder disease is a common ...

Meet SoFi, the little robotic fish that could help change the way we study the ocean. Created by researchers at MIT, SoFi is capable of swimming alongside real fish without any disturbance ...