Below you can find the When a tiny parasite enters an oyster's shell mantle cells cover it with nacre until this is formed Jeopardy Words Answer. The answer to When a tiny parasite enters an oyster's shell mantle cells cover it with nacre until this is formed has 5 letters. This clue belongs to the This side of parasites category and is part of Jeopardy Word Level 604. If you scroll near the bottom you will find other clues and answers part of level 604