"Creature" is a catch-all term for the varied fauna lurking in Europa's sea.
While their behaviour may vary depending on their species, creatures tend to be harmful to the crew and submarine and act as antagonists that can be randomly encountered in-game; they can also be part of a mission objective, as a target or guardian of a target.
When killed, creatures can be looted for various materials by grabbing the body (Default keybind 'G'). Some examples are:
Pages in category "Creatures"
The following 34 pages are in this category, out of 34 total.