I just tamed a Spino today... I was so excited, everything was spontaneous (I actually had some babies argentavis I had to feed). Then I had to cross a small portion of sea to get to my island, it was really nothing! My new Spino, with half health, stopped to fight some stupid piranhas. He just went on in circles without hitting them, but being hit... She just didn't listen to my whistles... I tried to get in and help her get them or that the piranhas went aggro on me, but she just died :(