Who is especially negatively affected by ocean acidifaction?

Groups of phyla than can be challanged: Especially groups with shells and calcium carboante skeletons, corals Corals bivals, gastropods, echinoderms. ^ have shells that can be dissolved. The progras is global so the animals cant really escape. For animals like barnecles it seems like they are more affected by temp shifts than acidification. Phytoplankton might benefit