Diplozoon paradoxum

Species of flatworm

Diplozoon paradoxum is a flatworm (platyhelminth) from the class Monogenea. It is found in freshwater fishes in Asia and Europe and known for its complete monogamy. This parasite is commonly found on the gills of European cyprinid fishes. It is usually around 0.7 centimeters long and has bilateral symmetry. It has several hooks at its mouth which it uses to grab on to the gills of a fish. From there it feeds on the blood of the cyprinid.

This keyword could refer to multiple things. Here are some suggestions: