âIn protest, the opposition did not participate in the vote, speaking of fraud and a âlaw of shame.ââ âAnd neither are condemnatory statements and protests, although they do serve the purpose of highlighting this scourge in our society.â
About. The purple sea urchin, Strongylocentrotus purpuratus, lives along the eastern edge of the Pacific Ocean extending from Ensenada, Mexico to British Columbia, Canada. This sea urchin species is deep purple in color and lives in lower intertidal and nearshore subtidal communities.It normally grows to a diameter of about 4 inches and may live as long as 70 years. Read more at Wikipedia. This entry is from. , the user-contributed encyclopedia.his sea urchin species is deep purple in color and lives in lower intertidal and nearshore subtidal communities. It normally grows to a diameter of about 4 inches and may live as long as 70 years. Read more at Wikipedia. This entry is from. , the user-contributed encyclopedia.
The adults are recognizable by their (usually five-point) radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or stone lilies. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone.chinoderms have a mesodermal skeleton composed of calcareous plates or ossicles. Each one of these, even the articulating spine of a sea urchin, is composed mineralogically of a crystal of calcite. If solid, these would form a heavy skeleton, so they have a sponge-like porous structure known as stereom.