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Spinosaurus facts for kids

Everything you need to know about the biggest meat-eating dinosaur ever, in simple words.

Quick answer

Spinosaurus was the biggest meat-eating dinosaur ever, up to 15 metres long, with a giant sail on its back and a crocodile-like snout for catching fish. It lived about 99 million years ago in Africa and could even swim.

10 cool Spinosaurus facts

  • It was the biggest meat-eating dinosaur ever, even bigger than T. rex.
  • It was as long as a school bus, up to about 15 metres (49 feet).
  • It had a huge sail on its back, taller than a grown-up.
  • Its name means spine lizard, because of those tall back spines.
  • It had a long, thin snout like a crocodile, perfect for catching fish.
  • Its teeth were smooth and cone-shaped for gripping slippery fish.
  • It could swim, using a big paddle-shaped tail to push through water.
  • It lived about 99 million years ago in rivers in North Africa.
  • It lived long before T. rex, so the two never met in real life.
  • It was the star dinosaur in the movie Jurassic Park III.

What did Spinosaurus eat?

Mostly fish! The rivers where it lived were full of giant fish, and Spinosaurus was built to catch them with its long jaws and pointy teeth. Sometimes it might have eaten smaller animals too, a bit like a giant grizzly bear at a river.

Could Spinosaurus swim?

Scientists think it could. In 2020 they found that Spinosaurus had a tall, flat tail shaped like a paddle, great for swimming. That makes it the only dinosaur we know that was really built for the water.

Common questions

How big was Spinosaurus?

Up to about 15 metres long, or 49 feet, roughly the length of a school bus. That makes it the longest meat-eating dinosaur ever found.

Could Spinosaurus swim?

Yes, probably. It had a paddle-shaped tail and dense bones, which suggest it swam and hunted in the water, unlike most other dinosaurs.

Is Spinosaurus bigger than T. rex?

Spinosaurus was longer than T. rex, about 15 metres versus 12 metres, but T. rex was heavier and had a much stronger bite.