Character error

Dr. Bates says that fish with teeth developed around 320 years ago. She probably means 320 million years ago.

Factual errors

An oil slick fire would do little damage to an underwater monster.

Continuity

At one point, Peter says the Devil Fish is eight feet away. A few seconds later, before it turns away, he says it's 20 feet away.

Continuity

When the Devil Fish attacks Dr. Bates, she trips and throws her ax overboard. Later, she picks it up off the deck, far from the side of the boat where she tripped.

Factual errors

When Peter throws the beer can over the side of the boat to test the underwater scanner, it sinks far faster than possible.

Character error

Janet continually mispronounces Cretaceous as "Cetaceous".

Continuity

During the intro scene with the boat, the distant shot and underwater view show enough light to see the underside of the boat and land in the distance. Scenes on deck take place in pitch dark.

Character error

When looking at the buoy display, Stella says No. 4 isn't working, yet the red light for No. 3 is the one blinking.