In Jurassic World, we meet a mosasaurus. We see it again in Jurassic World: Fallen Kingdom.

Jurassic World: Fallen Kingdom, Mosasaurus

At the start of the film, it's still in its enclosure. How did it survive all that time? While it was fed daily when the park was operating, and it had an Indominus Rex carcass to feed on, it was left alone for a couple of years.

How did it survive?

  • It's worth noting that the opening of Fallen Kingdom takes weeks or a month, rather than 2 years, after the end of the first film. [Jurassic World Fallen Kingdom Spoiler Special ft. J.A. Bayona & Colin Trevorrow]soundcloud.com/empiremagazine/…) – Longshanks Jan 15 '19 at 12:23
  • @Longshanks is that so? I recall the submarine not worrying about anything large being left alive in the bay. Hm... worth a question. – SQB Jan 15 '19 at 14:41
  • Yeah, he went on to say, “The opening sequence is set just after [Jurassic World]. There’s three years that pass [between the events of JW and the events after the opening of JW:FK]. We didn’t put that type up onto the screen, but the opening scene could even be weeks after or a month after, and then time passes to allow them to create [the Indoraptor]” – Longshanks Jan 15 '19 at 14:47
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    @Longshanks You may want to put that into an answer here. – TheLethalCarrot Jan 15 '19 at 14:51

In the film Jurassic World we see the mosasaurus jump out of the water to catch a pteranodon as well as beaching itself to catch the i-Rex™.

Presumably it can simply keep doing that whenever it gets hungry. There's apparently no shortage of dinos (both flying and non) left on the island at the end of the film.

Colin Trevorow seems to have confirmed this idea in a podcast interview with Empire Magazine

Empire: The mosasaurus. I have to ask, what has it been eating, because this movie is set like four or five years….

CT: Well, but the opening sequence is set just after, there’s three years that pass. We didn’t put that type up onto the screen but the opening sequence could even be weeks after or a few months after. And then time passes to allow them to create that creature

Empire: I was trying to work out if the mosasaurus was jumping up and eating birds...

CT: Probably some. I think if some nesting pteranadons were on the water and if an animal came down to drink and didn’t realise it was salt-water, they’re in trouble

Jurassic World Fallen Kingdom Spoiler Special ft. J.A. Bayona & Colin Trevorrow

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    One would expect the water to become quite foul after the pumps and filtration system shut down or broke. – Xantec Jun 11 '18 at 19:00
  • @Xantec - Given that it's an island you'd expect the influx and outflux to be tidal. Just a big tube that runs from a (the sea) to b (the enclosure) with an enormous grate to stop the exhibit from escaping – Valorum Jun 11 '18 at 19:03
  • Could do that I suppose. I wonder how long it would remain a viable filtration system, before the grate became too clogged. – Xantec Jun 11 '18 at 19:37
  • @Xantec - Assuming the grate had a big enough diameter, almost indefinitely. – Valorum Jun 11 '18 at 19:42
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    @Longshanks - Nice. I've added a transcript of the podcast and a link. Great find. – Valorum Jan 15 '19 at 20:11

I've raised mega predators and an animal such as the alligator gar can actually go about two and a half years without eating before it will finally die.

I had an animal shelter and individuals that wanted to see it shut down kill the power and many of the animals. Death the alligator gar was one that survived but the trauma of the event was enough that it never ate again I made several attempts over two and a half years and I think it may have consumed once or twice a small meal but essentially went without eating for two and a half years. I have a ball python that refuse to eat for 10 months and then suddenly started to feed again normally. And I've heard of large snakes and crocodilians going over a year for an animal as massive as the mosasaurus I would think that you're probably talking about years pending that nothing exhausted its energy reserves.

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