The monster's size varies considerably. In the early parts of the battle on the island its size relative to the humans near it is less than half its size in Loch Ness and later in the fight.
Sheriffs in Canada are not like the law enforcement professionals who hold the same title in the USA. In Ontario, sheriffs typically enforce civil orders, such as evictions and the like.
The rangefinder that Murphy uses to track the animal gives range and depth in meters but the size of the object in feet. All measurements should be in metric unless the equipment was made in the United states, Liberia or Myanmar.
A plesiosaur does not have claws or hands, it has flippers both both sets of limbs are flippers.
The same Canadian lake was used as a setting for Loch Ness. However the Scottish loch is much bigger then the Canadian lake with much different vegetation on the shoreline.
Murphy makes a claim to have "cyanide tipped bullets". Even though the sheriff had just released him, Murphy would have been immediately arrested again, since poisoned bullets are illegal anywhere in the U.S. or Canada.