Ecologically important Diadema africanum almost eliminated by unknown disease in Canary Islands

A marine pandemic is bringing some species of sea urchin to the brink of extinction, and some populations have disappeared altogether, a study has found.

Since 2021, Diadema africanum urchins in the Canary Island archipelago have almost entirely been killed by an unknown disease. There has been a 99.7% population decrease in Tenerife, and a 90% decrease off the islands of the Madeira archipelago.