Wait till you get a indomious rex. Build a pen. Incubate a t-rex and release into a pen. Keep him happy, for now. Incubate a indominous rex with the aggressive instincts 3.0 and tooth hardness 5.0 genes. This should get you to an attack of 151. (Once released, you'll get mommy's very angry)
Drive a ranger into the pen with the rex. Release the indominous rex into the pen with the rex. Take over the ranger vehicle. Hang near the rex. When they get into a fight take a picture (make sure they're fighting!) The photo should net you about 130k.
You can get 3 achievements in 1.
Mommy's very angry, and a kind of biological preserve, and learning where she fits in