Spielberg Mosasaurus

Solitary, Huge

Teeth (b[2d12+3] damage 2 piercing) 20 HP 0 armor


The ‘Meuse River Lizard’ was discovered by Johan Leonard Hoffman and formally given a full scientific name by William Mantell in 1829. Mosasaurus lived during the late Cretaceous period from 70-66 million years ago. The animal was 60 feet long, and weighed 5 tons. Mosasaurus belonged to the genus Mosasauridae, and its bones have been recovered from Western Europe and North America. Mosasaurus preyed on fish, birds and other marine reptiles. The Mosasaur also possessed a second set of teeth in its upper palate to prevent its prey from escaping. The Jurassic World theme Park on Isla Nublar housed an adult Mosasaurus. This animal was exhibited in a large lagoon in the center of Jurassic World’s boardwalk. The animal was central to an attraction known as the Mosasaurus Feeding show. The Mosasaurus was fed every two hours, before a semi-circular stadium overlooking the lagoon. The Mosasaurus is given a threat level of ‘high’ on the in-universe Jurassic World website. In addition, that Mosasaurus is also described as being 15 tons, heavier then any previously described species of Mosasaur known. This Mosasaur is also large enough to eat a Great White shark in one bite, as well as drench an entire stadium due to the wave caused by its great mass.

Instinct: Devour

18 thoughts on “Title”

  1. Underwater animals TO THIS DATE seem much more terrifying. Name one other animal next to the great white shark that has its own Week?

    Edit: forgive me, just occurred to me that many of the other members of this community may not know of “Shark Week”. In the USA, we have a week of all Great White Shark on television.

  2. Both probably. But let’s stick to the real one. How can the real one be twice as long and one-fourth the weight? 30’/20t vs 60’/5t. Both are marine mammals and sharks have the advantage of lighter bones/cartilage. Doesn’t seem to make sense.

  3. One paleo site says this “The biggest individuals of Mosasaurus attained lengths of 50 feet and weights of 15 or so tons.” That seems a bit more realistic.

  4. Ray Otus  

    One paleo site says this “The biggest individuals of Mosasaurus attained lengths of 50 feet and weights of 15 or so tons.” That seems a bit more realistic. That’s the version i’m using…Jurassic park movies always go big.

  5. Ray Otus  

    The size of the Mosasaurus created for Jurassic World varies between sources.

    The Mosasaurus page and the Mosasaurus Feeding Show page on the Jurassic World website give conflicting accounts about its weight. The Mosasaurus page says it weighs 5 tons while the Mosasaurus Feeding Show says it weighs 15 tons. It is further confirmed to be 15 tonnes on the Jurassic World Size Chart Poster.

    Another confliction is with its length, as RaptorPass 10 Mosasaurus, the Mosasaurus web page, and the Mosasaurus Feeding Show web page state it is 18 meters long, like real estimates of the species Mosasaurus hoffmani. However, the book Jurassic World: Where Dinosaurs Come to Life and the Jurassic World Size Chart Poster states it is 22 meters long, longer than any mosasaur ever discovered. The latter seems to be the most accurate, as the cloned Mosasaurus’ head is large enough to nearly swallow whole what appears to be an adult great white shark, a species that can grow up to 6 meters in length, while the largest mosasaur skulls ever discovered only reach to about the size of a human being. Though assuming the sharks fed to the Mosasaurus is 6 meters in length means that it is not actually 22 meters, but larger than the largest animal on Earth, the Blue Whale. However, great white sharks can also grow to lengths of 3 meters, so if the sharks being fed to the Mosasaur are of that size it would make the size given in Jurassic World: Where Dinosaurs Come to Life to be true.

  6. I’m trying to design an adventure around this bad boy…any ideas?Real Mosasaurus were native to Southern California, where I live. In the  Cretaceous most of this area was underwater and a Mosasaurus happy hunting ground. They most likely did snag prey along the beach like crocs and in the movie. Real saltwater crocs are terrifying and I like to imagine Mosasaurus was much like today’s saltwater crocs on steroids.

  7. Hey Mark Tygart. I live in San Diego. 

    Ideas? Dino men who worship one of these King Kong style and drive interlopers on their land into a coastal erosion-ravine where the Mo pops up and takes them as offerings?

    Or, the dino men have super science and they bioengineered the mo to be a submarine conveyance ala Harry Harrison’s West of Eden. They use therm as troop carriers to launch an invasion against a coastal city somewhere.

  8. Ray Otus I like it. I was thinking about the Battle of Ramree Island.

    The Battle of Ramree Island was fought for six weeks during January and February 1945, as part of the Indian XV Corps 1944/45 offensive on the Southern Front of the Burma Campaign during World War II. Ramree Island (Yangbye Kywan) lies off the Burma coast and in 1942 the rapidly advancing Imperial Japanese Army captured the island along with the rest of Southern Burma. In January 1945 the Allies launched an attack to retake Ramree and its neighbour Cheduba, with the intention of establishing sea-supplied airbases on the islands. The Japanese garrison of Ramree consisted of the 121st Infantry regiment, part of the Japanese 54th Division. The regiment’s commander was Colonel Kanichi Nagazawa.

    The battle is also associated with reports of many Japanese soldiers being eaten by the thousands of saltwater crocodiles lying in wait in the inland swamps. The Guinness Book of World Records has listed it both as “Worst crocodile disaster in the world” and “Most Number of Fatalities in a Crocodile Attack”

  9. Combine this beast + saurian worshipers with the funnel traps used for mass hunting game (e.g. https://plus.google.com/+RalphRoberts/posts/2UVXvbGEr7Ghttp://www.history.alberta.ca/headsmashedin/history/archaeology/archaeology2.aspx )

    for all sorts of possibilities.

    “So, what happened between last session and now that has you being chased up this seaside hill by a hundred lizard-people? You’re getting awfully close to the end of the slope, hey?”

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