All else being equal cold water is more dense than warmer water. The Arctic Ocean, being colder, would be more dense.
Atlantic ocean
arctic
Arahic Ocean
Caribbean Sea,Pacific Ocean,Gulf of Mexico,Hudson Bay
Canada has the longest coastline in the world. The Atlantic Ocean is to the east, the Pacific Ocean is to the west, and the Arctic Ocean is to the north.
The Artic ocean.
The Atlantic Ocean and the Arctic ocean.
North America shares its borders with the Pacific Ocean, Gulf of Mexico, Caribbean Sea, Atlantic Ocean, and Arctic Ocean.
The Arctic Ocean lies to the north of Europe and Asia.
Lake Baikal in Russia is the largest and deepest lake. I hope it hasn't been messed up.
It depends. If the river is in the mountains or near the Poles than it's probably colder but if the ocean is like the arctic ocean or something like that then that's probably colder
Arctic Ocean