This is the 6503rd most frequent Swedish word.
marine
"Marine" in Swedish means "navy" or pertains to military maritime forces.
In this sentence, 'marine' is an adjective describing animals that belong to the sea or ocean environment.
Han tycker om att läsa om marina djur.
He likes reading about marine animals.
Here, 'marine' is used as an adjective to describe the environment related to sea or ocean ecosystems.
De studerade den marina miljön i flera månader.
They studied the marine environment for several months.
In this case, 'marine' is an adjective referring to a theme associated with the sea or naval concepts.