![]() The scientists believe the green flourescence of the fish’s eye lenses help it detect prey better in dimly lit water.īioluminescent creatures emit and produce their own light, whereas fluorescence is the emission of light by a substance-not always living-that has absorbed light or other radiation of a different wavelength. NOAA scientists collected this specimen during a 2004 expedition for optical studies. But, in dim blue light-the type usually seen at depth-it shows its true fluorescent colors. Under white light, this shortnose greeneye fish ( Chlorophthalmus agassizi) looks unimpressive. Glowing Sucker Octopus Credit: © David Shale ![]() ![]() You can see a fangtooth specimen on display in the Sant Ocean Hall at the National Museum of Natural History. See more bizarre-looking ocean life in the Creepy Critters Marine Life slideshow and learn more in the Deep Ocean Exploration section. (This is called a diel migration.) Younger, smaller fangtooth fish filter zooplankton from the water and adults feed on fish and squid. During the day it stays in deeper areas of the ocean and at night, migrates up to shallower water to feed. It has been found as deep as 5,000 meters (16,404 feet), making it one of the deepest living fish, but is most common between 500 and 2,000 meters (1,640 and 6,562 feet). It's teeth are the largest in the ocean in proportion to body size, and are so long that the fangtooth has an adaptation so that it can close its mouth! Special pouches on the roof of its mouth prevent the teeth from piercing the fish's brain when its mouth is closed. This aptly named fish ( Anoplogaster cornuta) has long, menacing fangs, but the adult fish is small, reaching only about 6 inches (17 cm) in length.
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