Any diver knows: You should never cheap out on your equipment. Unfortunately, people on the ARK can't actually build their own diving equipment, which is why they have to take advantage of nature's solutions. Todays new dino, the Liopleurodon will serve its rider as a diving cylinder, as it will enable him or her to stay underwater for prolonged times without having to worry about oxygen as much as a normal diver.

• Wild: Liopleurodon Magicus is a mid-sized ocean predator. Typically between 20 and 25 feet long, it mostly hides within the reefs, waiting to ambush prey that swims by. Due to its low acceleration and medium speed, Liopleurodon tends not to chase prey that escape its initial devastating chomp attack.
• Domesticated: Neither the fastest swimmer, nor the most powerful ocean predator, Liopleurodon still has its uses for those wanting to stay underwater for extended periods of time. Many tribes use Liopleurodon for long duration oil-and-oyster harvesting trips. Often, those who don't believe in the Liopleurodons' qualities are shunned.
• Known Information: The species on the island almost seem to be magical. The reptile's skin secretes an oil that, when absorbed through the skin contact makes the rider process oxygen more efficiently for extreme diving. When trawling the ocean for resources, Liopleurodon will show you the way.