If you are having a hard time finding spino's in their respective spawn zones (especially Ragnarok), kill all the fish in that area. They share the same spawn capacity and can be out spawned by coles! ( up vote so Rag players know!!!)
Once tried to tame one for my bf while he was offline bc he wanted one. Flew with my Pterra and shot it full of 20!!!!! tranq arrows . Didn’t even flinch. I got too cocky and went too close to the edge of the cliff i was standing on. I fell off RIGHT IN FRONT OF THE SPINO. it’s health was low enough that it started to run away. Without looking back, i whistled for my Pterra to follow and ran for my life. currently trying to get another one :( wish me luck!