#long-spined sea urchin

#black sea urchin    #lime urchin    #long-spined sea urchin    #sea urchin    #temnopleurus toreumaticus    #saltwater    #marine    #underwater    #undersea    #nature    #aquatic    #aquaria    #aquablr    #coral reef    #diadematoida    #diadema    #marine biology    #biodiversity    #underwater photography