Talk:Lost River/@comment-26182984-20170829133136/@comment-176.63.170.27-20170830101540

The Precursors came to this island to find the cure. then a Sea Dragon Leviathan smacked the disease research facility with its head and got destroyed and the carar spread to creatures. that's why we can see a sea dragon leviathan's remains next to the destroyed disease research facility. the reason why the sea emperor was captured is because they realized it was immune to the carar and could produce small amount of enzyme but not enough to cure the carar. so they tried to hatch its babies but they couldnt. the emperor tried to talk to them but they couldnt hear it. and this is canon. but the other half of your theory might be true i dunno.