The diminutive medaka (Japanese rice fish) have been kept as pets since the Edo Period (1603-1868). They are hardy animals, an important quality for a pet, and they naturally occur in a variety of ...

In a weird and wacky finding, scientists have discovered the limit to how many times a strange fish can have sex in a single day. These fish, named medaka or Oryzias latipes, were found to be able to ...

Larval nutrition plays a role in determining the sexual characteristics of Japanese rice fish, also called medaka (Oryzias latipes), report a team of researchers led by Nagoya University. The findings ...

One of the biggest problems to solve for long-duration spaceflights is how to stop astronauts’ bones weakening in microgravity. But a series of experiments on live medaka fish aboard the International ...

Medaka fish that lacked functional Hmgn2 genes were unable to distinguish between simple shapes, revealing a new function for the regulatory gene. Medaka fish that lacked functional Hmgn2 genes were ...

Are you good with faces? So is the Japanese rice fish – at least, it is if the faces are the right way up. Just like humans, the tiny fish has no problem recognising faces orientated the usual way, ...

Scientists could gain insight into atypical sex development in vertebrates, including humans, by studying how nutrition affects sex changes in fish larvae. Larval nutrition plays a role in determining ...