this post was submitted on 11 Jan 2024
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Saltwater fish.
Hmm. Aren’t the Great Lakes in North America connected to each other and then to the St. Lawrence River via Lake Ontario, which eventually leads to the Atlantic Ocean? Maybe the map should include those large bodies of water too.
Lampreys are the greatest explorers among saltwater fish. They've mapped most of deepest darkest Greatlakesica, but most don't make it back out to report their findings.
How do biologists determine that the lampreys migrated from the ocean versus being hatched/born in the Great Lakes?
Accent. You can take the fish out of the ocean but you can't take the ocean out of the fish.
There are fish that go from saltwater to freshwater or vice versa. They're called anadromous fish. Salmon are one species like that. So you'll have to include every river as well.
Fish with a bird's eye view of the Sahára, this is a cool idea but not consistent with it's intention.
No Lake Baikal fishes :(