The Shriekers are the main antagonists of the 1996 American comedy-horror film Tremors 2: Aftershocks and its four sequels.

After a Graboid consumes sufficient food, it will undergo a several-hour long metamorphosis process, releasing between 3 to 6 theropod-like Shriekers from its body like a caterpillar becoming a butterfly.


Shriekers are 4-foot tall bipedal mollusks with a theropod dinosaur-like body shape. Their beaks are similar to those of the Graboids, being made up of a wide upper jaw, a thin lower jaw, and two hooked mandibles. Instead of three mouthed tentacles, they possess a single tongue that lacks jaws of its own. Shriekers possess large red pouches on their necks. On top of their heads, they have an orange, brain-like organ that can open up, allowing them to sense body heat like a pit viper.

Powers and Abilities

Shriekers possess the following powers and abilities:

  • Armored hide
  • Heat-sensing organ
  • Fast reproduction


At the end of the film, the Shriekers are trapped inside an ammunitions warehouse, which is blown up with several thousand pounds of explosive, killing them all.


  • Shriekers are hermaphroditic; by consuming enough food, they can parthenogenetically expel a rapidly growing infant from their mouths.

Photo Gallery

Community content is available under CC-BY-SA unless otherwise noted.

Fandom may earn an affiliate commission on sales made from links on this page.

Stream the best stories.

Fandom may earn an affiliate commission on sales made from links on this page.

Get Disney+