These guys produce oil but there own oil just like the basaileosaurus. It can really latch on to dinosaurs and other stuff only problem the grab attack when you attack a grabbed dino it does 2× less damage as your normal attack.
It does torpor over time while holding onto creatures. Although it does take a while to knock anything out on its own. Sharks and anglers will fall asleep in a few minutes but level 140 Mosa took 47 minutes for me. Would be better to have a tribemember to shoot it while you hold it.