Another important theme is the disruption of nature. The expedition into the Amazon and the discovery of the creature can be seen as an intrusion into the natural order. The creature may be acting out of self - defense as its territory is being invaded. Also, there is a theme of survival. The humans in the story are constantly trying to survive the attacks of the creature.
One of the main themes is the fear of the unknown. The creature is something that humans have not encountered before, and it instills a sense of dread.
The main themes in 'Creature from Black Lagoon' are quite complex. Firstly, there's the theme of the otherness. The creature represents something completely different from the human world, and this difference is both fascinating and terrifying. Then, there's the theme of scientific hubris. The scientists in the story are so eager to discover and study new things that they may not fully consider the consequences. And of course, the theme of nature vs. humanity is also prominent. The creature, as a part of nature, is in conflict with the humans who are trying to control and understand nature.