If one of these spawns near your base, ready a cross bow and climb on top of a rock at least two stories tall (they can climb up to one story) and aim a crossbow at it. Fire attacks untilnit runs away and chase it and start shooting at point blank.
This dinosaur is a very intricate but interesting dinosaur to get. I did find it near the shore line as it had seen me and wanted to eat me. However I had 5 tranq arrows which you can get at lvl 21. I shot all 5 and he fell to the ground. Very good dinosaur to tame especially in the water. It beats anything in the water even with its stun strike. I recommend using this dino to fight. I have one named Juju. One like equals One love for Juju