Deep below the surface of a river in northern Brazil, a “shy” creature tucked its “armored” body into a rocky crevice. Divers ...

For example, there are koi with light blue spots, ones with large red patches on their backs ... which ultimately determines how bright the fish appears. The brighter the fish, the bigger the ...

Looking at the fish in a laboratory ... and deep” bodies covered in armor-like “plates.” Their heads have “large” eyes, bumpy ...

A tiny, scaleless, freshwater fish, the highly endangered unarmored threespine stickleback is a fierce protector of its nest, which it defends by dashing forward with gaping mouth and “hackles” raised ...