14 DAY TRIAL // Staff at the Blue Planet Aquarium in Cheshire, England claims to have successfully bred one of the world's smallest fish species, i.e. Danionella translucida.
Adults belonging to this species measure just 10mm in length. Their offspring are about five times smaller and, just like their parents, they are pretty much see-through.
This makes them nearly impossible to spot with the naked eye, Daily Mail reports.
Otherwise put, people will just have to take Blue Planet Aquarium employees' word for granted when they say that such fish do, in fact, now live at this facility.
Wildlife researchers say that this species is native to shallow and fairly muddy streams in southern Myanmar, in Southeast Asia. Because they are so small and difficult to observe, not much is known about them.
Biologists hope that, by breeding them in captivity, they will be able to learn more about them.