"The Warden of the Depths is a sea dwelling massive creature, it has rather unknown origins.
Its an ilocuda. "ilo" means swallow in some goofy language.
The mod adds a huge water worm.
A juvenile Skull Crawler. From Kong Skull Island (2017) If you haven't watched the movie yet i advise you do.
A human that was tested on a little too much and ended up a monster. Nothing much to say.