`` It 's the largest single-species event '' in the Northeast , a marine mammal expert says . Comment: She did , however cite the nature of the dolphins and the geology of Cape Cod as two contributing factors in these events , historically : . Necropsies have been done on nine animals ; no cause has been determined . Some of the released animals have been tracked north of Cape Cod , where they belong .
`` It 's the largest single-species event '' in the Northeast , a marine mammal expert says . Comment: Necropsies have been done on nine animals ; no cause has been determined . Some of the released animals have been tracked north of Cape Cod , where they belong .