IUCN Red List Assessment
Red List Category
Red List Criteria
Reilly, S.B., Bannister, J.L., Best, P.B., Brown, M., Brownell Jr., R.L., Butterworth, D.S., Clapham, P.J., Cooke, J., Donovan, G.P., Urbán, J. & Zerbini, A.N.
Taylor, B.L. & Notarbartolo di Sciara, G. (Cetacean Red List Authority)
In view of how little is known about this species, and in the absence of evidence of a recovering trend, it is appropriate, pending analysis of more recent data, to base the assessment on the lower end of the range of the available abundance estimates, which are ~400 for the Okhotsk Sea and ~100 for the rest of the North Pacific, which implies a total of ~500, of which approximately half (~250) may be mature. It is therefore listed as Endangered under criterion D. Accumulation of new data over the next few years may lead to improved population estimates and a re-evaluation of the listing. A separate assessment has been developed for the eastern North Pacific subpopulation.