The loss of Symbiodinium from the host is known as coral bleaching, a condition which leads to the deterioration of a reef.
ðə lˈɔs ʌv sˌɪmbɪədˈɪniəm fɹʌmðə hˈoʊst ɪz nˈoʊn æz kˈɔːɹəl blˈiːtʃɪŋ, ɐ kəndˈɪʃən wˌɪtʃ lˈiːdz tə ðə dɪtˌiəɹɪɹˈeɪʃən əvɚ ɹˈiːf.