In July 1994, four small medaka fish travelled into space as part of an experiment that tested whether fish could reproduce in microgravity. The experiment was carried out during the Second International Microgravity Laboratory (IML-2) mission aboard the Space Shuttle Columbia, or STS-65.

In July 1994, four small medaka fish travelled into space as part of an experiment that tested whether fish could reproduce in microgravity. The experiment was carried out during…

In 1973, NASA sent two mummichog fish and 50 eggs aboard Skylab 3 to study how weightlessness affected their sense of balance. The fish initially swam in strange sideways loops,…