So I have been doing some thinking and it’s been a while since I though or thought of a theory.
Crowbill Sloth - Goliath
They are both strong and can stand there ground, they are also very territorial. Although Goliath can throw rocks and breathe fire he still is alike to the Sloth
Mammoth Bird - Kraken
There tentacles both release electricity, and they are both overpowered
Dune Beetle - Wraith
If you think for awhile you will see they are both quick and they have there scythes
Obsidian Grub - Behemoth
When the grub digs itself into the ground that acts like Behemoths rock wall ability
Venomhound - Gorgon
They both have poison type abilities and when a Venomhound pounces on you it kinda looks familiar to Gorgons pounce.
The only one I have doubts on it the Dune Beetle one, but other than that they all seem similar to each other and if my theory is correct then who is doing what to the Wildlife?
Something I had in mind just before posting this was: What if the monsters first saw these wildlife when coming onto the planets and adapting to them?