Long-spined sea urchin  (Diadema setosum)

Long-spined sea urchin

© Georgette Douwma / naturepl.com

Long-spined sea urchin showing siphon

© Stephen Jones / imagequestmarine.com

Long-spined sea urchin close up

© Jez Tryner / imagequestmarine.com

Banggai cardinalfish sheltering amongst the spines of a long-spined sea urchin

© Georgette Douwma / naturepl.com

Marine snail preying upon long-spined sea urchin

© Nature Production / naturepl.com

Long-spined sea urchin in habitat

© Roger Steene / imagequestmarine.com

Long-spined sea urchins near mangrove habitat

© Ben & Lynn Cropp / Auscape International

Long-spined sea urchins and starfish at low tide

© Jurgen Freund / naturepl.com