User blog comment:Adsper/All Possible Mobs/@comment-2605:A000:A487:4C00:658F:5304:B04A:6318-20171228172251/@comment-6040659-20180103162707

Alright, seriously. Stop. You guys have it mixed up.

Sure, you're right! There WAS a mosasaur discovered with black scales and a white underbelly, and there WAS a completely black ichthyosaur!

Guess what? That mosasaur was Tylosaurus, and that ichthyosaur was Stenopterygius. Not exactly the same as Mosasaurus and Ichthyosaurus.