The candirú is a parasitic freshwater catfish typically found in the Amazon River. The translucent, eel-shaped “toothpick fish” is reputed to be the most feared fish in the river and earned this distinction because of its proclivity for attacking and entering the human body via any available orifice, especially the urethra. The creature has protruding spines which make it nearly impossible to remove from the body without surgical intervention. How does the fish locate its human host? Discuss