Tag Archives: calcium

Ocean acidification and sea urchins

Like many other invertebrates, sea urchins may be vulnerable to increasing acid levels in the ocean. The hard parts of urchins (such as the sea urchin in our photo) are made up of calcite, magnesium-rich calcium carbonate. Ocean acidification could more ยป

Posted in Marine Animals, Seattle Aquarium | Tagged , , , , , | 1 Comment