Massachusetts holds just 4 striped dolphin records since 2000, too few to map a pattern: Bristol County has 2, Barnstable County 1, and the fourth carries no county. For an oceanic dolphin, a Massachusetts record nearly always means a stranding, and the Cape’s long hook is one of the great natural dolphin traps on the East Coast.
A thin record
Two of the 4 records were logged in November and the others in January and June, too few to show any seasonal pattern. The living animals stay far offshore in deep, warm-temperate water in every season.
A cautious state grade for a global species
NatureServe ranks the striped dolphin S2 in Massachusetts, imperiled, even as the IUCN lists it Least Concern worldwide. That gap isn’t a contradiction. The state grade reflects how rarely the species is documented in Massachusetts waters, at the cool northern edge of its comfort zone, and how thin the local evidence base remains.
Full species profile
