While usually passive, if it comes out of the ground and gems pop up, DO NOT GRAB THEM. It will chase you for a very long time and does a respectable amount of damage.

Roll rats DO NOT swim well.
If running away from one, lead it into deep water and swim around; it will eventually drown.

"MY PRECIOUS!" Don't take its preciouses cause unlike Gollum it will bite off more than your finger!

Found in the abberation lunar caves of genesis

This animal is literally based of the naked mole rat

Piles of loose gems are like wyvern eggs to them, if you take any, instant aggro

Don't pick up anything shiny it digs up or it will freak out.

Use a crab when harvesting gems. Simply wait for it to unearth a good haul (sometimes over 25 red gems and 40 blue gems) then grab the mole with the crab, take the gems, get back on and throw the mole away and fly (well jump good) to safety. Remember no matter how far away the mole who dug up the gems will get angry when they pick them up BUT other moles only aggro with it if they are close when you pick up the gems, or hit the mole.

Also, just like picking up a trike/stego egg, if you pick up a gem it will agro it