Rusty Uktank

The rusty uktank has split from its ancestor. The rusty uktank still feeds on a similar diet as its ancestor, but now primarily focuses on flora that contain iron. Feeding on so much iron has turned its skin red. Its shell is extremely durable and contains massive amounts of iron, while it also has more holes to let water in quicker to make compressed oxygen faster. Its bony ring is now gone and its limb that has its cutting claw is much longer, much more flexible and dexterous. The weight of this limb is counterbalanced by its heavy shell. It is used to scrape food down from high places, and to remove "iron eaters" from its body. Its front shell plate has many grooves and ridges, to create variations in perception, thus giving it a wider range of hearing. The ends of its feet spread out to reduce weight caused by its shell.

The rusty uktanks feeds on iron-containing flora by spraying a solution from its cutting claw to make its food softer by loosening the iron compounds. It is then knocked down and feeds on the mush with its slightly smaller mouth. It feeds on non-iron containing flora as its ancestor did.

The red skin is very useful and beneficial to the rusty uktank's survival. The skin is bright red when it has enough compressed oxygen and can spend more time on land. It turns a slightly bluish-purple the less oxygen it has. It looks at its cutting claw tentacle every now and then when on land; when its skin starts to turn the tell-tale bluish-purple, it goes back in the water to replenish oxygen.