This translucent, yellow-eyed, eel-like parasitic catfish grows to a maximum length of one inch. It cannot kill you outright, but if you experience the wrath of one, you might wish it had. A native of the Amazon, the fish has a penchant for swimming into urethral openings of unprotected bathers--men and women alike. Once inside it pops open its spinygill covers, which prevent it from being pulled out. The ensuing shock and infection have caused death, as has hemorrhaging resulting from attempts to remove it. Delicate surgery might be required. Also, the juice of two native fruits high in citric acid, both drunk and used externally where possible, can dissolve the gill spines and kill the fish.