If the Loch Ness monster exists at all, he (or she) could only be about as big as a sixth grader. A new study shows that there is only enough fish in the loch to feed a 31 kg (about 67 lb) creature. Some brainiac with nothing to do and too much time to kill had the guts to go to the loch and used sonar to estimate the number of fish in the lake and came up with an annual food supply of 93 kg. Since a cold blooded animal like Nessie would need to eat about three times its body weight each year, it could only weigh about 31 kg. Hell, I can even easily throw it outside the window. But.. did they count in the possibility that Nessie could be a vegetarian??