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!!!)
If you encounter this thing at a low level with a trike at LVL20. That spino will probably be 15 or lower, You see here. If you are battling one of these near a cliff, beat it up with hide armor on you and high movement speed and a save before fighting it. Drive it into the cliff and bat it out with you’re trike. Unless you’re taming, drive it into the hill and either hit it with The slingshot or Tranq arrows. (Unless you have tranquilizers.) soon it will faint and just find a river nearby and kill fish/Promoting Pelagoris.
As far as I know, only 3 wild carnivores will aggro onto the sight of your spino, other Spinos, Rexes, and Gigas. You can probably outfight other spinos, outrun rexes, or outfight lower level ones, and outrun gigas. Very useful.