It has a terrible turning circle, so stay behind the head and stab like mad. It also helps if you wait for it to attack something that will fight back, so that you get a disposable ally who will distract it. Easy kill on land really.
This guy is my favourite so far, right from when I first meet him, I was a noob and wandered close to a swamp well he came flying at me missed and disappeared behind me, I'm like what the neck was that, climbed a big arse rock asap and looked around, bugger came bounding back towards me and leapt straight up that rock like it was a mole hill.
Tamed the bugger and took him hunting, came across my first raptor and shat myself thinking oh rap I am screwed, nope Kappa flys over my head, collects the raptor and pile drives it into the ground several meters away, hilarious. Always fun times with Kappa around.
So me a lvl 15 nub found a lvl 3 spino, twas really ez to tame for some reason. Walked into a swamp turn around and see this thing launching itself on my spino. Long story short my spino got a nice meal.