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Anonymous
>>83536 The candirú parasitizes other fish. It swims into the gill cavities of other fish, erects a spine to hold itself in place, and feeds on the blood in the gills, earning it a nickname as the "vampire fish of Brazil". Recent research [1] has shown that candirú do not suck blood, but rather latch on to an artery and have blood pumped into them.
It is feared by the natives because it is attracted to urine or blood[2], and if the bather is nude it will swim into an orifice (the anus or vagina, or even the penisand deep into the urethra). It then erects its spine and begins to feed on the blood and body tissue just as it would from the gills of a fish. The candirú is then almost impossible to remove except through surgery. As the fish locates its host by following the water flow from the gills to its source, urinating while bathing increases the chance of a candirú homing in on a human urethra.
A well-circulated myth is that the candirú is capable of swimming up the stream of urine in mid-air to a victim standing on shore or a boat. However this is physically impossible as the maximum swimming velocity of the fish is opposed by the downward velocity of the urine stream, and the further impossible act of the 5-14 mm wide fish maintaining position and thrust within a 2-7 mm wide column of fluid.
A traditional cure involves the use of two plants, the Xagua plant (Genipa americana) and the Buitach apple which are inserted (or their extract in the case of tight spaces) into the affected area. These two plants together will kill and then dissolve the fish. More often, infection causes shock and death in the victim before the candirú can be removed. Though there have been documented candirú attacks on humans, there is no evidence the fish can survive once inside a human. It was recently sought after by Nick Baker, a wildlife specialist on British TV in a series about the world's strangest animals.
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