OK, i took Tonsers advise from my previous thread (thanks mate ) cooling down a critter then waxing his ass to some card. all harmless it appears. i let him go no probs. I must say though even chilled down, I grabbed him with my tweezers and i could here his jaws going on the metal.quite aggressive. seriously, i reckon they could puncture skin! I also saw plenty of venom in his mouth in later images. I promise pretty soon, I'll be doing aquatic photography again. just playing at the moment. i'm a little miffed, even after a sensor clean, this lens shows everything.