We found anchor tags anchored in a hole drilled in the test caused over 50%
mortality in only 1 month. Other authors who anchored a loose tag in a hole in the test
ŽDix, 1970; Nelson and Vance, 1979; Olson and Newton, 1979. also found that the hole
did not recalcify but found better urchin survival. Ebert Ž1965. found that a nylon line
threaded through two holes in the test was held firm by recalcification.