π Parasite replaces fish tongue, wild science
A tongue-eating louse, Cymothoa exigua, attaches to a fish's mouth after cutting off its tongue's blood supply. This parasite enters through the gills of fish, like the spotted rose snappers studied in November 1979 near Guaymas. The louse then functions as a replacement, feeding on blood and mucus while the fish continues to eat. Reproductive biology is also strange, with protandrous hermaphrodites maturing as males first. This parasite can even be found in fish sold in ordinary markets, like in southeast London in 2005. π