When first discovered in the 1930s, these eyeless, pigmentless fish were assigned their own genus, Anoptichthys. Since then, ichthyologists have determined they are at least 30 genetically isolated populations of…
This popular aquarium fish was unknown to science until 1956, when ichthyologists at the Smithsonian Institution and Stanford University published descriptions a day apart. It took a meeting of the…
It appears there are no documented cases of piranhas killing people, but there have been several cases where they have eaten humans that had drowned. In general, these specialized relatives…
Growing to a foot in length, this eye-catching relative of tetras and piranhas is a typical inhabitant on flooded forests in South America. For more than 50 years it has…