Excerpt from All About Sharks: A Complete Guide to the World’s Most Misunderstood Predator (Nov. 2017):
The smallest shark in the world is the dwarf lantern shark (Etmopterus perryi) which can fit in the palm of an adult’s hand at just 8 inches long (20 cm).
Small size isn’t what makes this shark so Cool, Gross & Weird: it’s the fact that this tiny fish glows in the dark.
Photophores on their belly and fins allow the fish to lure in prey and help hide from predators.
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