FWS Focus

Overview

Sea otters are a member of the weasel family (Mustelidae) and live in the near-shore waters along the North Pacific Ocean. They are the smallest of marine mammals and are excellently suited to their marine environment with adaptations in their skeletons, teeth, and fur.

Historically, sea otters occurred in near-shore waters around the North Pacific rim from Hokkaido, Japan through the marine coastal areas of the Russian Far East and the Pacific coastal areas in the United States as far south as Baja California. The worldwide sea otter population was drastically reduced to just a few hundred animals between 1742 - 1911, due to commercial harvest by the fur trades.

Click here for information about sea otter conservation in Washington State

Scientific Name

Enhydra lutris kenyoni
Common Name
Northern Sea Otter
Eastern Sea Otter
FWS Category
Mammals
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Geography

Launch Interactive Map

Timeline

Explore the information available for this taxon's timeline. You can select an event on the timeline to view more information, or cycle through the content available in the carousel below.

23 Items

Listing

Listing

Listing

Listing

Listing

Notice

4d

Listing

4d

Listing

Critical Habitat

Notice

Notice

Notice

Critical Habitat

Recovery Plan

Five Year Review

Recovery Plan

Notice

MMPA Stock Assessment Report

MMPA Conservation Plan

MMPA Stock Assessment Report

Five Year Review

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Listing

Oct 30, 2001

Oct 30, 2001 Listing
ETWP; Review of Plant and Animal Species That Are Candidates or Proposed for Listing as Endangered oโ€ฆ
  • Publication type: CNOR
Item 1

Listing

Jun 13, 2002

Jun 13, 2002 Listing
Endangered and Threatened Wildlife and Plants; Review of Species That Are Candidates or Proposed forโ€ฆ
  • Publication type: CNOR
Item 2

Listing

Feb 11, 2004

Feb 11, 2004 Listing (Threatened)
Endangered and Threatened Wildlife and Plants; Listing the Southwest Alaska Distinct Population Segmโ€ฆ
  • Publication type: Proposed
Item 3

Listing

May 4, 2004

May 4, 2004 Listing
Review of Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Noโ€ฆ
  • Publication type: CNOR
Item 4

Listing

May 4, 2004

May 4, 2004 Listing (Warranted But Precluded: Resubmitted)
Review of Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Noโ€ฆ
  • Publication type: 12m petition finding
Item 5

Notice

May 5, 2004

May 5, 2004 Notice
Notice of a Public Hearing for the Proposed Listing of the Southwest Alaska Distinct Population Segmโ€ฆ
  • Publication type: Public Hearing
Item 6

4d

Aug 9, 2005

Aug 9, 2005 4d
Special Rule for the Southwest Alaska Distinct Population Segment of the Northern Sea Otter: Proposeโ€ฆ
  • Publication type: Proposed
Item 7

Listing

Aug 9, 2005

Aug 9, 2005 Listing (Threatened)
Determination of Threatened Status and Special Rule for the Southwest Alaska Distinct Population Segโ€ฆ
  • Publication type: Final
Item 8

4d

Aug 15, 2006

Aug 15, 2006 4d
Special Rule for the Southwest Alaska Distinct Population Segment of the Northern Sea Otter
  • Publication type: Final
Item 9

Listing

Sep 12, 2006

Sep 12, 2006 Listing
Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Anโ€ฆ
  • Publication type: CNOR
Item 10

Critical Habitat

Dec 16, 2008

Dec 16, 2008 Critical Habitat
Designation of Critical Habitat for the Southwest Alaska Distinct Population Segment of the Northernโ€ฆ
  • Publication type: Proposed
Item 11

Notice

May 8, 2009

May 8, 2009 Notice
Designation of Critical Habitat for the Southwest Alaska Distinct Population Segment of the Northernโ€ฆ
  • Publication type: Comment Period Reopening
Item 12

Notice

May 8, 2009

May 8, 2009 Notice
Designation of Critical Habitat for the Southwest Alaska Distinct Population Segment of the Northernโ€ฆ
  • Publication type: Public Hearing
Item 13

Notice

Jun 9, 2009

Jun 9, 2009 Notice
Designation of Critical Habitat for the Southwest Alaska Distinct Population Segment of the Northernโ€ฆ
  • Publication type: Comment Period Extension
Item 14

Critical Habitat

Oct 8, 2009

Oct 8, 2009 Critical Habitat
Designation of Critical Habitat for the Southwest Alaska Distinct Population Segment of the Northernโ€ฆ
  • Publication type: Final
Item 15

Recovery Plan

Oct 12, 2010

Oct 12, 2010 Recovery Plan (Document Availability (non-FR))
Notice of Availability of Draft Recovery Plan for the Southwest Alaska Distinct Population Segmentโ€ฆ
  • Publication type: Draft
Item 16

Five Year Review

Apr 26, 2013

Apr 26, 2013 Five Year Review (Information Solicitation)
Announcement of Active 5-Year Status Review of the Southwest Alaska Distinct Population Segment of tโ€ฆ
  • Publication type: Notice
Item 17

Recovery Plan

Sep 6, 2013

Sep 6, 2013 Recovery Plan (Document Availability (non-FR))
Southwest Alaska Distinct Population Segment of the Northern Sea Otter (Enhydra lutris kenyoni): Avaโ€ฆ
  • Publication type: Final
Item 18

Notice

Apr 22, 2014

Apr 22, 2014 Notice
NOA of Final Revised SARs for Pacific walrus and 3 stocks of northern sea otters in AK
  • Publication type: Document Availability - Historical
Item 19

MMPA Stock Assessment Report

Jan 17, 2018

Jan 17, 2018 MMPA Stock Assessment Report (Document Availability)
Marine Mammal Protection Act; Stock Assessment Report for the Northern Sea Otter in Washington
  • Publication type: Draft
Item 20

MMPA Conservation Plan

Jan 17, 2018

Jan 17, 2018 MMPA Conservation Plan (Document Availability)
MMPA: NOA of Draft Revised Northern Sea Otter (WA) SAR
  • Publication type: Draft
Item 21

MMPA Stock Assessment Report

Apr 22, 2019

Apr 22, 2019 MMPA Stock Assessment Report (Document Availability)
Marine Mammal Protection Act; Stock Assessment Report for the Northern Sea Otter in Washington
  • Publication type: Final
Item 22

Five Year Review

Nov 21, 2019

Nov 21, 2019 Five Year Review (Information Solicitation)
Notice of 5-Year Status Reviews of the Short-Tailed Albatross (Phoebastria albatrus) and the Southweโ€ฆ
  • Publication type: Notice
Item 23