Meanwhile, light gradient data showed blue light was more easily visible in shallow water and red light in deep water. The findings suggest that natural selection in each species' visual system toward ...

AT FIRST, Ole Seehausen was overjoyed to find the small fish thrashing about in his net last spring. The blue-black cichlid with a saffron tail fin looked like one of the 200 species that biologists ...

Founder’s Briefs: An occasional series where Mongabay founder Rhett Ayers Butler shares analysis, perspectives and story summaries. Among those who cared about freshwater fish — and there were many — ...