Are sea otters endangered

This depends.

Under the Endangered Species Act northern and southern sea otters are listed as Threatened.

Protection Status: Southern Sea Otter

Endangered Species Act: Threatened*

Marine Mammal Protection Act: Depleted

California law: Fully Protected

IUCN Red List: Endangered (All Species)

CITES: Appendix I

(Other Lutris species listed under Appendix II)

*Except the population south of Point Conception in Southern California. This population is considered an experimental population and exempt from ESA and MMPA protections under P.L. 99-625.