How would the equilibrium change if the ocean became more acidic?

Acidic water of the ocean creates instability in the ocean ecosystem.
If the acidity of ocean increases the corals can't build skeletons and the shellfish also can't build the shells which they need for protection.
Corals are particularly important because they provide homes for many other sea creatures so we can conclude that acidic water of the ocean creates instability in the ocean ecosystem.
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