A Monstrous Strangulator is seen in How to Be a Pirate when Hiccup, Fishlegs, and Alvin come across one guarding Grimbeard the Ghastly's vast treasure under the island of Berk.

Traits and Abilities

A Monstrous Strangulator is a bizarre, tentacled dragon living in burrows and caves, never coming out into the sunlight. It has a pair of wings and small legs that are, for the most part, non-functional. It is transparent in color, though the tentacles can be white like uncooked fat. The tentacles excrete a slimy white-grey mucous that is very malodorous. Strangulators also have a spike on the end of their tails that resemble a hypodermic needle with which to inject a clear green toxin.

The effects of a Monstrous Strangulator's venom are quite spectacular. First the affected part of the body stiffens; then it turns green; and then the entire nervous system explodes.

Though armed with poison, Monstrous Strangulators most often dispatch their prey by strangling them with their tentacles. They capture prey by reaching their tentacles far out into the surrounding cave system and catching anything that stumbles across them.

Despite being able to speak an ancient form of Dragonese, a Monstrous Strangulator's brain rather small and cannot concentrate on both speaking and monitoring all its tentacles. Because of this, they can be tricked, allowing escape.