Eyeless Urchins "See" With Spines

Eyeless Urchins "See" With Spines

Sea urchin bodies act as big spine-covered eyes, according to researchers who created "Twilight Zone" conditions to test how well the marine creatures can see.

The South Coast sea urchin diver at the coalface of climate change

Diving for sea urchins off the coast of Eden. Photo: Stefan Andrews, courtesy Great Southern Reef Foundation. Second-generation diver Ryan Morris has had to adapt his business as abalone numbers decline and a climate change-induced explosion in long-spined sea urchins pose an existential threat to NSW’s fishing industry. His Pambula business, South Coast Sea Urchins, is helping to restore the kelp forests of the Great Southern Reef after they we…