the acid in the ocean is making it hard for shells to grow. but its also dissolving shells.
Ocean Acidification
Out of all the Carbon Dioxide in the air, the ocean absorbs 50% of it. Which is not safe for many animals living in the ocean.
Oceans Are Turning Acidic
The amount of carbon dioxide entering the oceans, can kill anything from plankton to whales.
CO2 might remain as bubbles dissolved in water
CO2 might be absored by algae and plants.
CO2 might react to the water and form carbonic acid
CO2 might even turn into limestone rock
Over the past 200 years
Over the past 200 years the ocean already has 30% more acid, with disasterous consequences for coral reefs. Creatures with shells and vulnerable fishes.
Shells
Flatford Mill (Scene on a Navigable River) is an oil painting by English artist John Constable, painted in 1816. It is Constable's largest exhibition canvas to be painted mainly outdoors, the first of his large "six-foot" paintings [more]
Coral Reefs
The acid in the ocean is also making it hard for corals to grow. Corals have a fragile structure, and with all the acid in the ocean, it weakens the structure and makes it hard to grow.
Shelled Animals
Starfish, Mussels, Clams, and Urchins are also going to have trouble building their shells because of the acid in the ocean. Every creature within the ocean that has to build shells will have trouble.
Plankton
Plankton also have shells they need to build. Plankton is a major part of the food chain, so if Plankton becomes extinct, the whole ocean ecosystem will began to go downhill.
Fish
Even though fish dont have shells, they still are getting affected by the acid in there habitat. The acid is getting into their blood, which is affecting the pH levels, which causes a condition called acidosis