>>7549792I agree with everything you've said so far, aside from the "Its big but there's no predators."
Lemme directly quote from Wikipedia on island gigantism, as I cant explain it properly myself.
"Island gigantism is a biological phenomenon in which the size of animals isolated on an island increases dramatically in comparison to their mainland relatives.
Large mammalian carnivores are often absent on islands, due to their large range requirements and/or difficulties in over-water dispersal. In their absence, the ecological niches for large predators may be occupied by birds or reptiles, which can then grow to larger-than-normal size. "
Basically, things get big if there's nothing to kill them, but the paradox is that they become the thing that kills everything.