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Fish Leeches
Piscicolid fish leeches. Upper: river darter, Percina shumardi from Little River, Oklahoma, with Myzobdella sp. leech (arrow) on caudal fin. Middle: female redfin darter, Etheostoma whipplei with Myzobdella sp. leech on anal fin (arrow) from Ten Mile Creek, Saline County. Lower: Close-up of same leech.