The phrase "sea monsters" refers to scary or mysterious creatures that live in the ocean, like mythical sea creatures or large and unusual marine animals. Full definition
A: I always feel that the old sketch book images of sea monsters from the 14th century are terrifying. (nintendaily.com)
If someone told me that their is a giant sea monster at the bottom of a lake I couldn't say for sure that it did not. (religion.blogs.cnn.com)
The futuristic sci - fi adventure, in which humans battle sea monsters, is yet another fantasy action movie that Chinese audiences loved. (thewrap.com)