"" *sigh* Carcharodon megalodon did not live during the Cretaceous (the giant shark appeared 47 million years after the dinosaurs died out) and it would not have been the top oceanic predator if it had lived in the Cretaceous (the big Mosasaurs would have been serious competition). In fact, Alten does have other giant carnivorous marine reptiles show up in his series, such as Kronosaurus, a pliosaur i.e. short-necked plesiosaur. Only, when they show up they are not only PREY to the Megalodon (pliosaurs were known to have eaten sharks quite often, judging by their remains, and quite a few were larger than 'Meg')""
Pliosaurs ate sharks but MUCH smaller sharks than the Late Cenozoïc sharks, let alone than C. megalodon.
I really wonder which "quite a few" pliosaurs were larger than "meg" ?
The largest Konosaurus is known at 10.5 m and 11 tonnes, the largest Pliosaurus species and individuals(P. funkei, macromerus and kevani) level off at 13 m and 20 tonnes and only a few very fragmentary specimens (the Aramberri pliosaur, the NHM symphysis, the Peterborough vertebra) have a possible upper size around 15 m and 30-35 tonnes. (Buchy et al. 2003, 2007, Mc Henry 2009, Knutsen et al. 2012, Benson et al. 2013, Foffa et al. 2014)
On the other side, C. megalodon reached CONSERVATIVELY 16 m and 50 metric tons.
There is no pliosaur known matching C. megalodon in size, and indeed, if it had lived in the Late Cretaceous, C. megalodon would have dominated the large mosasaurs (which were formidable but slender for their length).
I remove that part.
In any case, [Spinosaurus] was certainly aquatic and having it walking around on land or even wading in shallow water is wrong. It would have been submerged in almost all cases, and the sail would rarely be on the surface, as that would ruin its cover.
The idea is that Spinosaurus fed mostly on the fish swimming around and under him, so it would not need to conceal the sail to eat.
Arthropods among most intelligent animals? Sure we are not mistaking arthropods with invertebrates?
I request we take this trope and all its related tropes to the trope repair shop. They stink of complaining and are an easy target for it by paleonerds.
"Detecting trace amounts of mental activity. Possibly a dead weasel or a cartoon viewer"