Don't go in the water!!!!
The candiru feeds parasitically by burrowing into body orifices then drinking the blood of its victim.
It detects urine in the water to find a host.
It can lodge itself in the urethra, the tube inside the penis as well as the anus and vagina.
Barbs along its sides jam it in place.
Removing one without surgery is almost impossible.
One member of the family is known as Vandellia wieneri The Candiru - Wikipeadia