Linked from
The 20 pages that link to Sea otter, each with the reason it gives.
Kelp forestRelated: By eating urchins, sea otters can limit grazing pressure on kelp.
Sea urchinRelated: Sea otter predation can help maintain kelp forests by suppressing urchin grazing.
KelpRelated: By suppressing sea urchins, sea otters can help protect kelp forests.
SeaweedRelated: By controlling urchins, sea otters can limit grazing pressure on kelp.
Red king crabRelated: Sea otters can prey on king crabs and influence coastal crab communities.