Facts about Sea Urchin Habitat. Now that you’ve got a whole bag full, the real work begins. "Sea urchins live as male and females, and fertilization of eggs takes place while they float in the ocean," Ebert said. Some are dangerous but most are not. For maximum flavour, enjoy sea urchin as soon as it leaves the water. By now you should have a basic understanding of what sea urchins are and what roles they can plan in the saltwater aquarium. Sea urchins are small, spike-covered sea creatures that live in oceans throughout the world. Divers encounter sea urchins in almost everybody of saltwater, including all of the world’s oceans. You’ve spent the entire morning, or day even, combing your beach for local or Florida shells and other ocean goodies. "The larvae then feed for a month or more before turning into tiny sea urchins." Home Live How to clean seashells, sea urchins and coral How to clean seashells, sea urchins and coral. You’ve spent the entire morning, or day even, combing your beach for local or Florida shells and other ocean goodies. They are common on rocky tidal areas, but are found from the intertidal to the deep ocean. See photos of sea urchins (including fire urchins, pencil-spined urchins, and more) in this oceans life photo gallery from National Geographic. "The larvae then feed for a month or more before turning into tiny sea urchins." Urchins also live in lush kelp forests deep in the sea. The Pacific-dwelling red sea urchin is an example of these fascinating echinoderms that make the ocean bottom their home and are thought to live more than 200 years. Previously, scientists believed that they live for 10-15 years. There are two species of rock-boring sea urchins … How long can sea urchins live? Also hedgehogs are often found in coastal waters. Tons live in the Atlantic Ocean as well. Sea urchin injuries are common because sea urchins are common. Sea urchins mate in the spring. Sea urchins live only in the ocean and cannot survive in fresh water. Each has its own unique name and characteristics. With fewer predators at these deep sea levels, urchins often grow larger and live longer than their intertidal counterparts. Many types of sea urchins can live 30 years. Sea urchins, called wana by the Hawaiians, are common on the floor and rocks of Hanauma Bay. They also are found in both warm and cold waters. Sea urchins are related to starfish and are a type of animal called an echinoderm, which means "spiny skinned." March 27, 2015 Rachel Live 41. It is sometimes referred to as the Shore sea urchin. March 27, 2015 Rachel Live 41. In the absence of predators, sea urchins can really do a number on a kelp bed. Answer: Long. No matter where sea urchins live, if there is overpopulation Sea Urchin often cause habitat destruction, called sea urchin barrens, shown in … The info which follows is from a really neat paper by Tom Ebert (Oregon State University) and John Southon (Lawrence Livermore National Labs) in NOAA Fisheries Bulletin and can be found here. They are common on rocky tidal areas, but are found from the intertidal to the deep ocean. Sea urchin sushi generally doesn’t use the freshest sea urchin available. Shore divers need to take care to avoid stepping on urchins when wading in shallow water. Elder sea urchins grow at a constant rate, not noticing changes in the environment.