Pszemol wrote on 7/24/2006 5:48 PM:
Fish reaction to food is the first kind: they do not have to learn to eat.
Fish reacting to the fridge opening or seeing a person next to the tank
is the second kind - the same as the one Pavlov dogs developed an
salivation reflex for the sound of the bell. Do more reading here
http://www.es.flinders.edu.au/~matto...lecture30.html

People do that, hence the phrase "mouth watering".

Wayne Sallee
Wayne's Pets