The centipede grows to be a foot long.
3 seconds sound clip from the Creature from the Black Lagoon (1954) movie soundboard.
You can hear this line at 00:13:36.866 in the Blu-ray version of the movie.
Quote context
[...]
- It's a winding brook compared to the Amazon.
- This is exactly as it was 150 million years ago when it was part of the Devonian era.
- Sounds like the beginning of the world.
- It is.
- Even the animals here grow as they did in Devonian forests.
- The anteater is a giant with the strength of a bear.
- The centipede grows to be a foot long.
- The Amazonian rat is as big as a sheep.
- Dr. Maia says we're gonna drop anchor in a couple of hours. Maybe you'd better get some rest.
- Again, Lucas. We want to make sure my boys hear us at camp.
[...]