 Those little single celled algae are lost, expelled, degraded, and so what happens is you see straight through the host animal's transparent tissue to its white skeleton. We know that the type of symbiote that a coral associates with can really change its capacity to tolerate elevated temperatures. As adults, some corals are actually able to host mixed communities of symbounds. Some of these corals are able to change the proportions of their symbiote types when they experience a temperature stress event. And we found that there were some changes, that the maternal colonies were shuffling their symbiote communities, and more importantly that when they made those changes in their communities, a lot of the time that change was directly transmitted to the offspring.