I am New in this sub

Hii guy's just wanted to ask a quick question want to start the black Lagoon anime but I have some doubts does the manga is fully adapted the story or not I am asking this just because I have so much backlog in manga I can't afford to add more I will try Black Lagoon again in the future if the story is not fully adapted in anime and pls tell me the order to watch with ova's and special their isn't much to watch but still.