The marine invertebrate trade — corals, anemones, sea urchins, and starfish — raises welfare questions at the frontier of sentience science while also threatening wild reef ecosystems.
Marine invertebrate welfare occupies uncertain scientific territory — the evidence for subjective suffering in corals and most reef invertebrates is limited. However, the precautionary principle, combined with the ecological harm of wild collection, supports preferring captive-propagated specimens. Coral farming reduces collection pressure on stressed wild reefs while meeting aquarium demand. For more neurologically complex invertebrates like anemones, basic harm avoidance is prudent. The trade shift toward captive propagation represents positive movement even under scientific uncertainty about invertebrate sentience.