Freshwater snails (Fig. 1) constitute an important element of thefreshwater fauna; thus they are very important consumers of pri-mary production and secondary producers (Brönmark, 1989; Yeungand Dudgeon, 2014) and many species from across a wide range oftaxa, both invertebrates and vertebrates may include snails in theirdiet and some species are specialized molluscivores (Brönmark,1992; Dillon, 2000; Michelson, 1957).