An evil scientist in a remote jungle location cultivates giant crawfish (!) as a means of scaring trespassers away from his diamond mine. Condensed from one of the last Republic serials, "Panther Girl of the Congo". (1955).
Reviews
GamerTab
That was an excellent one.
Lawbolisted
Powerful
Lumsdal
Good , But It Is Overrated By Some
Philippa
All of these films share one commonality, that being a kind of emotional center that humanizes a cast of monsters.