Ancient (in web terms) myth, that if you type out pleco or plecostomus, that your suckermouth catfish or Loricariid will die. This is especially mad, as Plecostomus is no longer a valid genus name (now Hypostomus), and may not be a valid species name either.
In any case, just how is the fish, the demons, the fates or whatever the agent of destruction is supposed to be ever know what you have written, or what the currently valid names might be?