Suctioning teeth
If images of aliens scare you, this next one will keep you up all night. Squids might not look dangerous, but they are. They live in the depths of the ocean, and their suction mouths full of sharp teeth can make anything look like prey. You won’t believe what damage those teeth can cause.
With their teeth, these squids can scrape the skin and surface of other sea creatures and plants. Their long, gooey shape is similar to that of eels but is not as dangerous. In addition to their scary teeth, these small mouths work as a plunger so their food cannot escape once suctioned up.