List of Chromista by conservation status
As of September 2021, the International Union for Conservation of Nature (IUCN) has evaluated the conservation status of 15 species within Chromista. The IUCN has not evaluated any protist species other than those in Chromista. No Chromista subspecies or subpopulations have been evaluated. No evaluated Chromista species are confirmed to be extinct, but four are tagged as possibly extinct. As of 2005 the New Zealand Threat Classification System has evaluated 38 species of macroalgae as Threatened and 23 as Data Deficient.