Home » Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to Algae MCQs Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to December 30, 2021 8 Views Q. Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to chlorophytachrysophytapyrrophytarhodophyta Answer: pyrrophyta