Possibly also leeches - https://www.ncbi.nlm.nih.gov/pubmed/8073013 https://www.ncbi.nlm.nih.gov/pubmed/8073013 "many fish leeches directly transmit several bl

Possibly also leeches - https://www.ncbi.nlm.nih.gov/pubmed/8073013 https://www.ncbi.nlm.nih.gov/pubmed/8073013 "many fish leeches directly transmit several blood parasites" "Consequently, the leech is a potential vector of many pathogens, especially in regions with an endemic spread of human and/or animal pathogens."