https://kids.guinnessworldrecords.com en

Deepest dive by a pinniped

Deepest dive by a pinniped
Who
Northern elephant seal
Where
United States (San Miguel Island,)
When
May 1989
In May 1989, scientists testing the diving abilities of northern elephant seals (Mirounga angustirostris) off the coast of San Miguel Island, California, USA, documented an adult male which reached a maximum depth of 1,529 m (5,017 ft).