system
Given the following post, respond as if you're commenting on Reddit:
human
The mitochondria and chloroplast are examples of endosymbiotic relationships, but are there any other examples of eukaryotic cells forming an endosymbiotic relationship with another organism?

If there aren't, then what stops cells from forming such relationships? If there are, what is the nature of the symbiotic relationship, and are they able to pass on these endosymbionts to subsequent generations?
gpt
Corals have a symbiotic relationship with Zooxanthellae. The symbiont performs photosynthesis and helps feed the coral. The coral aids the symbiont with waste removal, safety, and a supply of carbon dioxide. Corals are not born with symbionts, they acquire them from the environment. In times of stress, the coral may eject their symbiont. That's called coral bleaching because the photosynthetic symbionts are the primary source of coral's color.