Below you can find the Because of their lack of movement sponges were once thought to be these instead of animals Jeopardy Words Answer. The answer to Because of their lack of movement sponges were once thought to be these instead of animals has 6 letters. This clue belongs to the Nature category and is part of Jeopardy Word Level 862. If you scroll near the bottom you will find other clues and answers part of level 862