Unseen monsters are usually the scariest. They would have been had the theme been not already done-to-death and maybe having it set in an earlier time. Atmosphere of the film was good - cold dark isolated on an island with a small population. It was entertaining but could have a more climactic arc for the characters.
Review of The Block Island Sound
The Block Island Sound
(2020)
UNSEEN MONSTERS ARE USUALLY THE SCARIEST.
17 April 2021
Warning: Spoilers