Purple sea urchin 
Purple sea urchin 
Red cushion sea star 
Red slate pencil urchin 
Red starfish 
Red urchin 
Red Velvet Star 
Red-knobbed Starfish 
Red-tipped Urchin 
Robust sea cucumber 
Ruby brittle star 
Sand sifting starfish 
Sandfish 
Sea Cucumber 
Slate pencil urchin 
Slate-pencil Sea Urchin 
Snake Fish Sea Cucumber 
Snake sea cucumber 
Spiny Cushion Star 
Spiny ophiocoma 
Spiny starfish 
Spotted Sea Star 
Sputnik Urchin 
Stichopus horrens