The following is a description of an animal parasite. The parasite may be found in blood vessels of the human intestine. Eggs pass through into the alimentary canal and are released in the faeces. Larval stages are found in a freshwater snail as a secondary host. Re-infection of humans occurs through the skin. The animal described is most likely to be

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Schistosoma japonicum is a species of trematode, one of the parasitic flatworms known as schistosomes, which fits the description provided. It is known for causing schistosomiasis, a disease that involves the parasite's eggs being passed in feces, a freshwater snail acting as an intermediate host, and human infection occurring through skin contact with contaminated water.

The Following Is a Description of an Animal Parasite