Multiple choice Tiedemann's bodies are found in sponges hydra asterias hirudinaria Reveal answer Fill a bubble to check yourself C Correct answer Explanation Tiedemann's bodies are peculiar structures found in the coelomic fluid of starfish (Asterias), part of the echinoderm group. Sponges have choanocytes, hydra has cnidocytes, and hirudinaria (leech) has different specialized cells.