1966/8: Ebirah, Horror of the Deep aka Godzilla vs. the Sea Monster 1966

Trailer:

Watch movie:

https://archive.org/details/godzilla_vs_ebirah_titra_track 

https://en.wikipedia.org/wiki/Ebirah,_Horror_of_the_Deep

https://www.moriareviews.com/sciencefiction/godzilla-vs-the-sea-monster-ebirah-horror-of-the-deep-1966.htm

https://eofftvreview.wordpress.com/2019/05/31/gojira-ebira-mosura-nankai-no-daiketto-1966/

http://www.1000misspenthours.com/reviews/reviewse-g/godzillavstheseamonster.htm