Cymothoa exigua• Parasitic crustacean• Enters through the gills of its fish host (snapper). • Attaches to the fish's tongue • Feeds on the rich blood pumping through the artery underneath • Causes the tongue to atrophy and disintegrate.• Eventually it replaces the old tongue with its own body.

Sacculina carcini • A female sacculina is small • Finds a weak spot in a crab’s shell and injects herself• She grows "roots" wrapping around its eyestalks and deep into its legs and • Eventually steers the Crab for the rest of their co-mingled life• The crab will forgo its own needs

Guinea Worms• Human consumes contaminated water• Infiltrate their host's intestinal walls and commence mating• Males die, females live for a year then head to lower extremities and bore a hole through skin• Lesion begins to fester and burn – want water• If breaks apart could cause a fatal infection• Dr. winds around stick inch-by-inch 3-4wks