He seems to be ready to storm inside after the boy, right into the welcoming gob of the unknown monster.

Yet if it were not one of these huge marine mammals, how was this unknown monster to be classed?

Anderson came up with the idea for the movie from a reoccurring nightmare where he was chased by an unknown monster.

Moreover, there were monsters unknown as yet to myth and superstition.

Green Eyes - that strange, unknown monster, stood before the victim.

Since the unknown monster had already struck, Amalric felt that he was safe in leaving the girl alone for a few minutes.

His ship versus unknown monsters out of deep space.

The unknown monster that was to be the villain of the book has never been revealed.

They did not believe in unknown monsters, but what could have made such big, wet marks?

This underwater world has not yet been thoroughly explored, so it is possible that unknown monsters exist there.