Ok so here is how I tamed my Spino. I had the help of my brother, so maybe bring some help just in case. All we did was find the nearest Spino, and I shot arrows at it to lure it out of the water so it wouldn't drown while unconscious. Then my bro shot a couple tanq arrows while i shot tranq darts. It took 2 hits from each to knock it out. So it was fairly easy for me. Good luck and I hope this helps.

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