New shipment with larger sizes and exceptional colors! Some very dark! Rare Deep sea urchins, Coelopleurus Mailardi The colors in these are exactly as pictured! These are products of nature so each one is unique. Some are very dark, some multi colored, some only have couple of colors. Several size variations to choose from. Please note: All sizes are approximate. Measured by calpers. you will receive 1 urchin per order. Due to the delicate nature of these urchins, PRIORITY SHIPPING is recommended