HUECHELITO

This is the name the media gave to a monster which was supposedly to be found in Lake Huechulafquen, Argentina.  Reports of the creature were coming in from at least 1922.  It had a long neck.  Its head looked like a lizard's.  When it submerged, it caused such stirring and turbulence in the waters that witnesses inferred it had a very large body.  On reflection, it doesn't sound like the sort of monster you should try poking with a stick.