f inned ▁pilot ▁wh ales ▁along ▁the ▁mid - At l antic ▁sh elf ▁break ▁between ▁Del aware ▁and ▁Georges ▁Bank . ▁ ▁Off ▁the ▁coast ▁of ▁Japan , ▁the ▁distributions ▁of ▁the ▁Sh i ho ▁and ▁N ais a ▁types ▁are ▁well - document ed ▁and ▁largely ▁non over la pping , ▁with ▁the ▁N ais a - type ▁inhab iting ▁the ▁warm - temper ate ▁waters ▁of ▁the ▁K uro sh io ▁Current , ▁and ▁the ▁Sh i ho - type ▁inhab iting ▁cold - temper ate ▁waters ▁of ▁the ▁O y ash io ▁Current . ▁Some ▁evidence ▁suggests ▁these ▁populations ▁might ▁even ▁be ▁distinct ▁sub species , ▁based ▁on ▁differences ▁in ▁morph ology , ▁mit och ond rial ▁DNA ▁and ▁bre eding ▁seasons . ▁ ▁Bey ond ▁Japan , ▁the ▁N ais a - type ▁occurs ▁in ▁sout heast ▁Asia , ▁the ▁Indian ▁Ocean , ▁and ▁Hawai i , ▁and ▁the ▁Sh i ho - type ▁can ▁be ▁found ▁in ▁the ▁California ▁Current ▁and ▁off ▁Peru . ▁ ▁Pil ot ▁wh ales ▁show ▁strong ▁n atal ▁phil op at ry , ▁often ▁remaining ▁year - round ▁in ▁places ▁such ▁as ▁Hawai i , ▁the ▁U . S . ▁ ▁and ▁British ▁Virgin ▁Islands , ▁the ▁Made ira ▁Islands , ▁and ▁parts ▁of ▁California , ▁though ▁some ▁populations ▁migr ate ▁with ▁the ▁season al ▁and ▁annual ▁fl uct u ations ▁in ▁temperature ▁and ▁product ivity . ▁ ▁Once ▁commonly ▁seen ▁off ▁of ▁Southern ▁California , ▁short - f inned ▁pilot ▁wh