Thread:ChishioKunrin/@comment-34981175-20200112021302/@comment-4010415-20200112033725

We have a citation on the page, linking to a tweet from a member of CRWBY. In that Twitter thread, they were talking about Grimm that had appeared in the episode "As Above, So Below", since they could finally come out and tell us things about those Grimm since the episode had been released. Miles reveals the name of the Teryx, they talk about CRWBY nicknames for these Grimm, and Larissa mentions they had nicknamed the Megoliath creatures of Grimm "Manny". Since they were specifically talking about Grimm that had appeared in that episode in particular, this is confirmation that those Grimm are Megoliaths.

The Megoliath you're referring to looks the same as the other elephant-like Grimm, except bigger and more evolved, indicating that it's an elder Megoliath.