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Creature Eats and Becomes Fish Tongue. One of the more bizarre animals roaming around our oceans, this parasitic crustacean not only eats the tongues of fish but also then replaces it. It's chilling to think about, but surprising the fish endures and often resumes a somewhat normal life. Come learn a bit about the Tongue-Eating Louse.

Gross science: This parasite crawls into a fish's mouth and replaces its tongue. Enough said.

Note: In this video, we refer to the parasites as "protoandritic." The real word is "protandric." We take accuracy very seriously and we apologize for the error. Thank you to the viewer who pointed this out.