Hard outer layer of a marine animal, often found on beaches

Let's find possible answers to "Hard outer layer of a marine animal, often found on beaches" crossword clue. First of all, we will look for a few extra hints for this entry: Hard outer layer of a marine animal, often found on beaches. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.