User blog comment:BannedLagiacrus/Leviathan Discussion/@comment-5963861-20170108013539/@comment-27125903-20170108191308

Alright you know how Nibelsnarf and Gobul are still leviathan despite having amphibious features?

Gobul has altered animations off of Royal Ludroth (such as the rolling attack).

I guess they mostly base the monsters class from animations and what not.

Though there's an exception which is Remobra's which have animations from flying wyverns rather than snake wyverns.