the reff was done very quickly .. as you can tell

1. monster arms
   
2. back of ears has the spot like most large felines
   
3. antennae or horns . optional
   4.facial markings and ear to head ratio
   
4. right- pupil black, iris red, rim white, sclera red
   left- pupil white , iris red, rim black, sclera red
   6.back markings
   
5. frontal markings
   
6. thick rubbery spinal horns are optional they can also be tentacles

additional info :

la brea is a saber toothed tiger and symbiotic alien hybrid

she can shapeshift and change her gender

but mainly stays in this form

her insides(guts ) can be any color

she can secrete black ooze from her skin

is also bio luminescent in random parts of her body mostly just her eyes and bare skin

she can make tentacles come out of her mouth

when enraged her face turns to slime and revels her skull like this http://www.furaffinity.net/view/6941206/

other forms

Mantis : http://www.furaffinity.net/view/7417611/

plushy : http://www.furaffinity.net/view/6952922/ with the updated stripes

xenomorph : http://www.furaffinity.net/view/8150491/