This placed them alongside other species of rasboras, small freshwater fish in the same family as carps and minnows. In 1999, after realizing their breeding behavior was closer to another type of ...

But fewer people are aware of their very distant relatives — a type of bony fish called the rainbow shark. Unlike their larger counterparts, rainbow sharks are actually small freshwater fish ...

Scientists discovered a 15-million-year-old fish fossil, Ferruaspis brocksi. It has preserved stomach contents and visible ...

NAIROBI ― A new killifish species, scientifically known as Nothobranchius sylvaticus, has been documented in seasonal swamps ...