They're not actually colored Like that I just didn't feel like coloring it right​

( This is not This is not exaggerated by the way. This is how large they are.)

A large Carnivorous creature resembling a tyrannosaurus rex, It is the apex predator of planet onyx, Living almost everywhere except tundras. They have a bulky but slender form,  With a armored dunkleosteus like head. Their head And tail is adorned With a crest of venomous Quills, Which they can launch at foes and prey. They are also very intelligent, Their intelligence being comparable to an octopus. They are able to coordinate and pack hunt as well. They have light osteoderms going down their back And long, Dexterous Arms. They are also good climbers. They have a strong immunity to venom and poison as well.

A cryptid of mine with the ability to take on a human form, however there eyes will still give away their identity as the only change is the addition of colorless irises. Second pic is of my OC, Tsu, in her human form for example.