They are common in microalgal-invertebrate symbioses on coral reefs and elsewhere, including: sponges, scleractinians (hard corals) including their eggs and mucus, sea anemones, octocorals (soft corals), a zoanthid, a jellyfish, tridacnid clams and ascidians.
(They; are; common; L:in microalgal-invertebrate symbioses)
They
are
common L:in microalgal-invertebrate symbioses