Monsters Resurrected (also known as Mega Beasts) is a documentary that aired on the Discovery Channel from 2009 to 2010. The basic plot of each episode (there are six in total) involves a different extinct predator. Each episode usually has the creature hunting its prey, fighting other creatures and eventually being driven to extinction.
Animals Not to Scale: Spinosaurus is type 1, making a light snack out of what the narration describes as a thirty-foot Rugops, making the spinosaur comparable in size to Godzilla. Xiphactinus and Cretoxyrhina are type 2. Elasmosaurus is type 1.
"At the end of "T-Rex of the Deep", the narrator asks, 'But what if the comet [that wiped out the dinosaurs] had missed?' However, if the dinosaurs were wiped out by an extraterrestrial object, it would have been an asteroid, not a comet."
Artistic License - Biology: Pretty much every scene involving the Elasmosaurus, or long-necked plesiosaur. Basically, the neck of the one in the show is as flexible as a big snake, while the neck of the real creature would only be about as flexible as a big stick.
Chewing sauropods, and their nostrils are (wrongly) atop their heads.
Abelisaurid hands proportioned like those of typical theropods. They should be absurdly tiny with clawless stumps for fingers. Compare this (Skip to the 00:45 mark, you may have to sit through an advertisement) to this◊.
Referring to the "terminator pig" as Dinohyus, although it had been renamed Daeodon years before.
The European version corrects this at least. As the paleontologists' commentary couldn't be changed, the narrator makes an effort to point out the correct name.
The skull of the show's Spinosaurus is modeled on that of Suchomimus, which didn't even belong to the same subfamily. Compare the show's model◊ to the real deal◊.
And perhaps the most notorious example: Essentially, the Spinosaurus is portrayed as the ultimate predator of all time, able to effortlessly kill any other predator that lived in its time and region. In short, it is depicted devouring a Rugops with one bite, killing a Carcharodontosaurus by slashing it across the face with its claws and effortlessly tearing apart the giant crocodylomorph Sarcosuchus. And that isn't all, its size is practically Godzilla-portioned, as it is able to pick up a 30ft long Rugops in its mouth and the thing appears to be no bigger than its head. Spinosaurus didn't really grow larger than 60ft, meaning the one depicted in the episode would have been 300ft long or more.
Australian Wildlife: The giant monitor lizard Megalania, the catlike marsupial Thylacoleo, the huge wombat Diprotodon and the giant kangaroo Procoptodon.
Bad Ass: Many creatures in the series may qualify as this.
Infant Immortality: Averted several times. There's the terror bird eggs that get eaten by wolves, the young mosasaur that is killed by sharks, the juvenile Paralititan attacked by a Rugops, the bear-dog pups that are killed by wild dogs and the Acrocanthosaurus eggs that are stolen by deinonychosaurs.
Noisy Nature (may overlap with Most Annoying Sound for some): And HOW! Slash! Crunch! Stomp! It's as if the SFX guys put on their headsets and recorded themselves munching loudly on a full meal. Almost every movement of the beasts is synced to ground-stomping or flesh-tearing.
It's also shown being a threat to Acrocanthosaurus, despite the fact it was much, much smaller. The talking heads mention that it could have been a threat to Acrocanthosauruseggs and hatchlings, but it's shown scaring off a pretty good-sized young Acrocanthosaurus. This is the same sort of misinterpretation that can be seen in Clash of the Dinosaurs.
Weaksauce Weakness: Spinosaurus' sail is an extension of its vertebrae - if it tips over, it breaks its back and dies.
Another Artistic License - Biology for the documentary, as the spines would not have included the spinal cord. The bleeding caused by an multi-ton animal breaking several of its own bones would be a far greater problem than the one the documentary presented.