Urchins & starfish both belong in the echinoderm family We will discuss starfish and urchins fitness to your tank in a separate chat. Today let's focus on sea cucumbers. Unlike their urchin and starfish armored relatives, the sea cucumber typically do not have calcified armor deposit above their skin layer, leaving them vulnerable to predators, extreme temperature, and water pressure.. Discover the benefits of sea cucumbers in your reef aquarium. These marine invertebrates help maintain substrate health and contribute to a balanced ecosystem.
We ship both multicolored and yellow caribbean sea cucumbers under this item. They both can grow to a length of 6-8 inches in captivity, but are sent around 3 inches. They are excellent sand stirrers, and will consume algae and detritus building. This reef safe sea cucumber is a perfect addition to any established reef tank with a sand base. This species reaches a length of around 5" and will most often be active at night where they are master cleaner as they reach into all the nooks and crannies. Due to variations within species, your item may not look identical to the image.