Below you can find the These absorbent marine creatures are so motionless they were formerly thought to be plants Jeopardy Words Answer. The answer to These absorbent marine creatures are so motionless they were formerly thought to be plants has 7 letters. This clue belongs to the Invertebrates category and is part of Jeopardy Word Level 807. If you scroll near the bottom you will find other clues and answers part of level 807