Thank god that Aquatherium is extinct. Its name directly translates in Latin to Water Beast... And there's a good reason why
Fossils show a maximum of 20ft long for this Sea Monster. They are shown as large Pyrosharks and there body looks the same but the fossils show a large bowl and horns in its head. It is said to beach itself eating coast animals.. Many beached fossils have been found.
Unknown. But since the deep TF2 ocean is completely untouched. Aquatherium might just be alive in the deep waters of resize servers....