Here's a breakdown:
* Oceanic Ecosystem: Sea lions inhabit the neritic zone, which is the shallow water area extending from the shoreline to the edge of the continental shelf.
* Coastal Ecosystem: They are often found in areas close to the shore, including rocky shores, sandy beaches, and estuaries. They may also use kelp forests for shelter and foraging.
* Specific Regions: Sea lions are found in the North Pacific Ocean, including coastal areas of North America, Russia, Japan, and the Aleutian Islands.
Their ecosystem is not just limited to the water, though. They also come ashore for breeding, pupping, and resting. This means they rely on terrestrial ecosystems (rocky outcroppings, beaches, etc.) as well.
So, while you could say sea lions inhabit a marine ecosystem, it's more accurate to say they are part of a complex coastal ecosystem that includes both the ocean and the land.