This is the 4836th most frequent Catalan word.
submarina
"Submarina" means "submarine" in English.
Here, 'submarina' is used as an adjective describing 'fauna', indicating something underwater or related to the sea.
La fauna submarina és rica i diversa.
The marine fauna is rich and diverse.
In this sentence, 'submarina' again acts as an adjective, describing 'cova' (cave) and specifying its marine location beneath the sea.
Ells van explorar una cova submarina durant les vacances.
They explored an underwater cave during their vacation.
Here, 'submarina' functions as an adjective modifying 'fotografia', referring to photography conducted beneath the water's surface.