Below you can find the There are about 5000 species of these extremely porous animals that have no heads or internal organs Jeopardy Words Answer. The answer to There are about 5000 species of these extremely porous animals that have no heads or internal organs has 7 letters. This clue belongs to the Zoology category and is part of Jeopardy Word Level 2206. If you scroll near the bottom you will find other clues and answers part of level 2206