the silver fish

It's well known that every fisherman hopes his nets will be full of fish, and it's only natural that any fish would wish to miss the fishermen's nets. This is a story of a relationship unlike the usual one between a fisherman and a fish. The silverfish goes to the fisherman herself and says, 'Take me and put me in the net.' And the old fisherman tells her, 'I really don't want to catch you.' So, is the silverfish crazy, as her companions say? And is Uncle Othman the fisherman really old and senile, as people say?