FANDOM Spinosaurus aegypticus. A super-predator with a large sail and a long snout. A deadly foe for both dinosaur and crocodile.
— Allen, about Spinosaurus
in Battle of the Alphas

Spinosaurus (name meaning "Spine Lizard") is a genus of large spinosaurid theropod dinosaur that originated during the Middle Cretaceous period in what is now North Africa. Measuring 14 meters in length and weighing over 7 tons, Spinosaurus was among one of the largest species of carnivorous dinosaurs ever to walk the Earth. It is also one of the world's most famous dinosaurs, recognizable for its long arms, crocodilian-like head, and the large sail on its back, similar to Dimetrodon.

In the Series 2 episode, "Battle of the Alphas", a single Spinosaurus was brought to the park. It resides in Spinosaurus Rainforest. Some juveniles follow the team through the time portal as well.


Era & DiscoveryEdit

Spinosaurus lived during the Middle Cretaceous period in North Africa from 112 – 93 million years ago and was the dominant predator of its time. Discovered by famous German paleontologist Ernst Stromer in 1912, it was originally depicted with a skull resembling that of a Megalosaurid. During WWII, the type specimen was lost during an allied bombing raid, since the museum it was housed in was across the street from the Nazi headquarters.

The old depictions made it look like a Megalosaur with a sail on its back, but then in 1986, the well-known dinosaur Baryonyx was discovered and that changed the look of Spinosaurus forever, giving it the new view to more of a bipedal crocodile with massive, muscular arms and a sail on its back.  It has gotten a posture allowing it to be both bipedal and quadrepedal. Since its discovery, Spinosaurus has become one of the most famous prehistoric creatures in the world.

Physical AttributesEdit

Spinosaurus Primeval

Spinosaurus was a light-built but very large bipedal theropod dinosaur, standing around 17 feet (5.3 m) tall, measured 45 feet (13.9 m) long, and weighed 7 – 20 (15,000 – 44,000 lbs.), approximately twice the height and length of a pickup truck, making it one of the largest carnivorous dinosaurs that ever existed, third counting Giganotosaurus second and Tyrannosaurus first. Spinosaurus had long jaws that measured up to 5.5 feet (1.7 m) long, and conical teeth evolved to snatch fish from the water. The conical shape spread the stress forces of struggling prey moving frantically in their jaws, in a more even manner, similar to a crocodile.

Spinosaurus also possessed a long, narrow crocodile-like snout filled with conical, non-serrated teeth, and it was recognizable by six-foot-tall neural spines along its back which were connected by a membrane to form a sail-like structure. Similar to but larger compared to both Dimetrodon and Edaphosaurus, Spinosaurus had a large sail on its back that measured up to 6–8 feet tall, which allowed to heat up via turning it towards the sun if it was ever cold or lose heat if it was too hot.

It also had very long, five-foot forearms, and while it spent much of its time on its two legs, it was shown to occasionally crouch down onto all fours. It had massive, clawed forearms that were up to 7 feet (2.1 m) long and used them to walk if needed. It had a long flexible tail, like a crocodile, to propel it through the water. It had a long neck up to 7.5 feet (2.3 m) long for mobility when catching fish.

Behavior & TraitsEdit


Spinosaurus was discovered to be a solitary animal, only getting together with other members of its species during mating season. It competed for food with its rival, Carcharodontosaurus. This massive carnivore preyed on fish, dinosaurs, and pterosaurs alike. Its crocodile-like skull, and especially the holes which were said to contain sensors, support this notion.

In its natural habitat, Spinosaurus was a territorial, volatile, and aggressive creature which would chase after any potential prey it caught in its territory, and it would return once it knew that there was good prey in the area. In both hunts and combat, Spinosaurus would rely on its jaws as a weapon for crushing to death and eating its prey and opponents. Spinosaurus lived mainly in the mangroves and floodplains of Africa hunting fish, but it would hunt large terrestrial animals if needed. Strangely for a semiaquatic animal, it lived in areas which are now part of the Sahara Desert.

Journal EntryEdit

One of the world's super predators, Spinosaurus Aegypticus, the "Egyptian Spine Lizard", was among the largest known theropods and land carnivores to have ever existed, measuring 45 ft. long and weighing more than 6300 kilograms. Arguably the apex predator of their time, these African carnivores were only rivaled by Carcharodontosaurus. Spinosaurus lived in North Africa. The fossil locations indicate that Spinosaurus lived in coastal regions with floodplains, swamp flats, and mangrove forests. For this reason, their diet has recently been supplemented with fresh fish.

An elongated jaw filled with sharp teeth make short work of prey and a long neck lets them bite enemies and not stray too close. With a long snout, one could compare their lifestyle to that of a crocodile, as Spinosaurus lived by rivers, lakes, and swamplands, where it could also eat fish but also attack dinosaurs and other animals that entered their territory.

Like the smaller Dimetrodon and Edaphosaurus, Spinosaurus also possessed a sail on its back. This sail allowed it to lose heat if it needed to cool down. And if it needed to warm up, it turned its sail towards the sun. Spinosaurus are also surprisingly nimble, which gives them an advantage in battles for food against other apex predators, although these confrontations can result in lethal consequences.

— Allen, in his Journal, about Spinosaurus



  • Spinosaurus is the third-largest predatory dinosaur brought to the park.
  • The sound effects for Spinosaurus are that of crocodile, sea lion, seal, and walrus sound effects. It also produces the classical Sharptooth roars used in the first, second, and sixth "Land Before Time".
Community content is available under CC-BY-SA unless otherwise noted.