anchor: The sea urchin, Arbacia punctulata, test requires control egg fertilization equal to or exceeding 70 percent.
positive: Arbacia punctulata is the scientific name for the sea urchin, and the test requires an egg fertilization that is equal or greater than 70 percent.
negative: The sea cucumber, Arbacia punctulata, requires a egg fetilization test that is equal to 40 percent.