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Stay away from pencil urchins as they eat coral. Some representatives of this species are known for the power to catch and eat a mantis cancer. Coral predators are a natural part of a healthy coral reef ecosystem. The one bad thing with urchins in reef tanks is they LOVE to eat coralline algae. What Do Sea Urchin Eat? Some species of sea urchins live close to the shorelines where they are mostly out of the water. Sea otters are another predator of urchins in the kelp forests. avoid food partners which overwhelm – sea urchins’ taste is delicate – scrambled eggs do well in this respect The crown-of-thorns sea star is a well- known predator of coral polyps. The creatures are also found in coral reefs because of the growing algae, which is a delicacy. However, excessive densities of some corallivores, such as crown-of-thorns starfish (Acanthaster planci) and coral-eating snails (mainly Drupella spp. Females of the species produce eggs. By signing up, you'll get thousands of step-by-step solutions to your homework questions. - Some species can be venomous (long spine, obviously, but flower urchins sting via their tube feet) Tuxedo urchins are usually the best specimens, but the purple pincushion urchins are usually good too. An 18-year study of Kenya's coral reefs has found that overfished reef systems have more sea urchins -- organisms that in turn eat coral algae that build tropical reef systems. In some situations, where the processes of reef calcification may be depressed and/or urchin populations reach outbreak densities, the scraping effects of urchin feeding can remove coral recruits, reduce cover of important coralline algae ref and lead to unsustainable bio-erosion. Between April 30 and June 30 the hunting of sea urchins is strictly regulated. Sea urchins eat a variety of algae, mollusks, sponges, carrion, as well as starfish and sea urchins of smaller size. Sea urchins, which live in sandy or soft ground, eat silt and sand, swallowing with it microscopic organisms. Large numbers of these sea stars can devastate reefs, leaving behind only the calcium carbonate skeletons. They have a rigid, usually spherical body bearing moveable spines, which gives the class the name Echinoidea (from the Greek ekhinos, spine). The name "urchin" is an old word for hedgehog, which sea urchins resemble; they have archaically been called sea hedgehogs. The also prey on sessile, or immobile, sea creatures such as coral and sea sponges. If you are using RealReef rock or another colored rock they are great! If you want your other rocks to get that purple color, an urchin may slow/stop that from happening. Urchins can also have negative impacts on coral reefs. In Italy the season for sea urchins is mid November to the end of April. Ways of eating sea urchins. Sea Urchin Reproduction and Lifespan. Answer to: What eats sea urchins in a coral reef? 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