Tuhia he tomokanga mo tenei waahanga - I tangohia te ekara kopare i te raarangi a te kawanatanga o te kawanatanga o te United States o nga momo whakangaromanga i te Hurae 12, 1995, na te US Fish &amp; Wildlife Service, i te wa i whakariteritehia mai i te "whakamarumaru" ki te "whakamarumaru". I te Hōngongoi 6, 1999, i whakatakotohia he tono "Ki te Tangohia te Kotiro Pango i nga Whenua 48 o raro mai i te Rarangi o nga Motu e Mate ana, e whakawehi ana hoki". I tangohia mai i te rarangi i te Pipiri 28, 2007. Kua tohua hoki he taumata morearea o te waahanga iti rawa o te awangawanga i runga i te Rarangi Whero IUCN. I te rerenga hinu o "Exxon Valdez"
I te tau 1989, tata ki te 247 i mate i Prince William Sound, ahakoa i hoki mai te taupori o te rohe ki tana taumata i mua i te rerenga i te tau 1995. I ētahi wāhi, kua nui haere te tokomaha o te iwi, ā, kua waiho nga ekara hei mate kino.