but the real show-stopper at many Pennsylvania Fish and Boat Commission hatcheries is the rare and elusive blue trout. The blue trout, which can range from sky blue to dark blue in color ...

Blue discus fish are bred in several color varieties, including plain blue and blue-turquoise with dark or red, almost ...

Off-white Pacific halibut: While dark red muscle is associated with ... Those lucky enough to encounter a blue fillet at the fish counter may be drawn to it for its aesthetic appeal; Worthington ...

Some dragon fish sport lures known as barbels with glowing fibers that resemble blue fiber-optic lights. [A Glow in the Dark Gallery] Although blue is the default shade of the deep sea ...

In all but the shallowest waters, red fish would simply appear dark grey. As a result ... They absorb short-wavelength light (blue) and re-emit photons of light at longer wavelengths.