I had not heard of them as being a host to any fish parasites.
http://books.google.com/books?id=1WXuP_4...tes&f=falsehttp://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CCgQFjAB&url=http%3A%2F%2Fwater.usgs.gov%2Fwrri%2F00grants%2FNJfish.pdf&ei=BOgTU-W0BsehkQfmm4C4Aw&usg=AFQjCNHBk2v5JNMhsz8zkhcG-GR0Xh1KfA&bvm=bv.61965928,d.eW0
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CEkQFjAG&url=http%3A%2F%2Fwww.hccfl.edu%2Fmedia%2F472154%2Flecture%252014%2520and%252015%2520aquatic%2520parasites.ppt&ei=BOgTU-W0BsehkQfmm4C4Aw&usg=AFQjCNEteu8tXcDwz1EMb83hiu8HOKsppw&bvm=bv.61965928,d.eW0