Ocean Acidification and Marine Animal Welfare

Ocean acidification from CO2 absorption is causing physiological harm to marine animals and disrupting ecosystems that billions of marine animals depend on.

Key Facts

Ocean pH has dropped by 0.1 units since the industrial revolution, a 26% increase in acidity
Calcifying organisms including corals, molluscs, and some crustaceans are particularly affected
Fish behaviour and sensory systems are altered by acidification in ways that impair survival
Coral bleaching from combined acidification and warming is destroying reef ecosystems
Ocean acidification is projected to intensify significantly without major emissions reductions

Welfare Considerations

Marine animals experiencing physiological disruption from acidification face welfare harm that is diffuse but enormous in scale. Fish with impaired chemosensory abilities cannot effectively avoid predators or find food. Molluscs and crustaceans building shells in increasingly acidic water face higher energy costs and reduced shell integrity. Addressing ocean acidification requires climate action at global scale, making it a welfare issue that connects individual choices to planetary systems.

What You Can Do

Support aggressive climate action as a marine welfare priority
Advocate for ocean acidification to be recognised as an animal welfare issue
Reduce personal carbon footprint to contribute to emissions reduction
Support ocean monitoring research that tracks acidification impacts on marine species
Engage with policy debates linking climate and ocean welfare outcomes