It has a circular body covered in heavy spines.

The spines spear food and protect an urchin from predators. Pacific purple sea urchins are easily identifiable on the ocean floor because of their distinctive purple color. They mainly live along the coast line of Alaska down the Pacific Coast to Mexico and tend to live in kelp forests as kelp is a main source of food.

Oregon's urchin fishery had a boom year last year, when red urchins were scarce in California but before their purple cousins had spread north. ... predator of the ultra-hardy purple urchin. The purple sea urchin lives in kelp forests, and has spikes for mobilization and protection from predators.

… A purple sea urchin's pincushion appearance comes from its round inner shell, called a "test." Like all echinoderms, they live only in marine environments, and can be found all along the Pacific coast, from Alaska to Mexico. Purple sea urchins are found on the pacific coastline from Alaska to Cedros Island, Mexico. Despite their name, purple sea urchins (Strongylocentrotus purpuratus) aren't always purple in color, ranging from olive green to pink. Thanks for the A2A! Too many purple sea urchins and not enough bull kelp continues to stymie California’s red urchin dive industry.

The purple sea urchin grows from a greenish colored juvenile to a vivid purple adult. The sea urchins mouth is setup underneath its body in order for it to … Shaped like a squashed sphere, its hard outer covering is called a test. How to Prepare Sea Urchin in 5 Easy Steps. To prepare whole sea urchin, turn it upside-down over a bowl of water and use sharp kitchen scissors to cut an opening all the way around the mouth, being careful not to poke the uni inside. Larger than the purple urchins, reds were until recently the valuable core of a small but thriving commercial market. They are covered in pincers, tube feet, and purple spines that move via ball-and-socket joints, using these spines to grab food and protect themselves from predators. Now, like the purples, the reds have little to eat, and their prized gonads have withered into unappetizing strips of … Strongylocentrotus purpuratus aka Purple Sea Urchin is one of the three most common members of the genus; the other two being S. fransciscanus aka Giant Red Urchin and S. drobachiensis aka Green urchin.

The explosion of purple sea urchins is the latest symptom of a Pacific Northwest marine ecosystem that's out of whack. They need protection from predators: spiny lobsters, sheep-head fish and sea otters. A purple urchin explosion is sending the delicate marine ecosystem off the Pacific shore into such disarray that other critical species are starving to death. The Purple Sea Urchin is a medium sized sea urchin compared to its relatives the Green and Red Sea Urchin, measuring up to 15 centimeters across.

Red sea urchins have also been impacted by the purple urchin scourge.

Pacific purple sea urchins on the West Coast of the US are available year-round, while green sea urchins from Maine peak in winter. Size 4 inches (10.2 cm) Diet Brown and red algae, kelp, and decaying plant and animal matter; Range Eastern Pacific from British Columbia to Baja California; Habitat Rocky shores from the low-tide line; Physical Characteristics


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