They are both predators. TYPICAL predator behavior is to attack prey, and only fight other predators if they are (a) preventing you from getting scarce prey, or (b) weak enough to be a "cheap" source of meat.

So why would pteracuda and sharktopus attack each other instead of hunt for separate prey (which seems to be quite plentiful for both)?

  • 3
    You're questioning the logic of a SyFy movie?
    – calccrypto
    Nov 7, 2015 at 22:56
  • 3
    @calccrypto - I dare! Nov 7, 2015 at 22:57
  • 1
    I believe there was a paper recently in Science or Nature that addressed this very subject. Nov 7, 2015 at 23:02
  • 4
    I'm fairly sure that they were contractually obliged to do so, not least because of the film title.
    – Valorum
    Nov 7, 2015 at 23:13
  • I actually found 1/2 of the answer (for Sharktopus side) Nov 8, 2015 at 1:49

2 Answers 2


two predators attacking each other makes sense if you assume they are territorial species

some animals not necessarily predators will lay claim to a territory and viciously defend it (cape buffalo are a good example)

A wolf pack entering the territory of another pack could also be used as an example although in this case the likely outcome would be the alphas of each pack would fight and the packs would join together under the winner


Well, I figured out an answer for Sharktopus side: it was controlled via neurotransmitters.

From the script:

This is an earlier prototype that injects the neurotransmitters right into the creature's brain.
Now we don't need remote control. It's got a one track mind to seek and destroy Pteracuda.

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