I had saw one on the river untamed near my base, I was getting my tranq arrows ready, until that time I was crafting spike wall it breached my base and instantly killed my albino t-rex (beware), from that day I started hating them, because they have some crazy aggression, but when I found out one of them got stuck in the river, I tamed one despite the hate, and I've been setting my tamed spino into aggressive mode to kill all dinos in my area, sadly I cant forgive these guys so I dont care if it dies.