The Scorpios rex also has a pair of short spurs growing out of the back of its heels. Unlike the Indominus rex or Indoraptor, it has infrared vision which allows it to see the heat signature of its prey. Its semi-prehensile tail also aids it in climbing. Much like the Indoraptor, it has opposable thumbs and grasping talons, which enable it to climb and ambush prey from above.
It has venomous spines on its elbows, tail and neck due to its scorpionfish DNA, which can detach and embed in an opponent's flesh in a manner similar to that of a porcupine. These traits included a brachycephalic muzzle, red eyes with slit pupils set high on its skull, a prominent overbite and jagged, uneven teeth. Its features are heavily deformed and grotesque, which Simon Masrani determined made it unfit for display. Both individuals were adorned with charcoal black scales.
The Scorpios rex is depicted as a medium-sized theropod, being smaller than Indominus rex and slightly larger than the Indoraptor and bigger than the Velociraptor.