How many types of walrus are there?

There are two recognized species of walrus:

1. Atlantic walrus (Odobenus rosmarus rosmarus): Found in the North Atlantic Ocean.

2. Pacific walrus (Odobenus rosmarus divergens): Found in the North Pacific Ocean.

There was previously a third subspecies, the Laptev Sea walrus (Odobenus rosmarus laptevi), but it is now considered to be part of the Pacific walrus.