Shelomt

Fed
When given Creppan, it gives oxygen spore seeds to produce oxygen.

Killed
When killed, it gives a shell which can be used for armor for your duplicants to protect them from the attacks these dudes do when attacked.

Lives
In lush rocks.

Lifespan
This thing has a really long lifespan, if genetically disordered, it goes to 80 cycles, if perfect, it goes to 140 cycles.

Appearance
It looks like a shell with eyes.

Tips

 * Make sure you are prepared, if not, well, welcome to a WORLD of pain.
 * The amount of damage these things do when agitated is insane, they can almost instant kill a duplicant with no protection.