Many marine creatures produce chemical light in a process called bioluminescence. The typical color produced is blue. One group of deep-sea fish, however, called the Malacosteid family, produce an unusual 
red color. They are also called dragon-fish or loose-jaws. Other fish cannot see or detect the red color, so dragon-fish are able to communicate with each other in secret.
Technical application:
night vision
Certain spiders protect their delicately crafted insect nets with a special silk rope that reflects ultraviolet rays. Birds can see the ultraviolet rays and recognize the webs as obstacles they should avoid.
If engineers can reproduce the effect, it might save birds from their occasional accidental suicide runs into glassy buildings. German engineers at Arnold Glas copied the spiders and glazed their Ornilux-brand glass with a web-like pattern of ultraviolet-reflecting coating to save the birds from high-speed headaches.
Technical application:
innovative glas against birds collision
Many morpho butterflies are colored in metallic, shimmering shades of blues and greens. These colors are not a result of pigmentation but are an example of iridescence through structural coloration: the microscopic scales covering the Morpho’s wings reflect incident light repeatedly at successive layers, leading to interference effects that depend on both wavelength and angle of incidence/observance.
Technical application:
“painting” without pigments, thermal sensors
Insects have a wide field of view and are acutely sensitive to motion, as anyone who has tried chasing a housefly knows. Researchers have now c
reated a digital camera that mimics the curved, compound structure of an insect eye. These cameras could be used where wide viewing angles are important and space is at a premium — in advanced surveillance systems, for example, or in unmanned flying vehicles and endoscopes.
Technical application:
theater, giga-pix camera