[dangus]

Cold-water fish (salmon, cod, herring, trout) often has lots of fat.

[Sacajaweau]

You mean we’re instinctively meat eaters? Who knew...

[Harmless Teddy Bear]

But most of those are ocean fish. We are talking inland fresh water. So except maybe for trout not a lot of fish with fat.

Also fresh water fish tend not to swim in schools so it would be more of a challange to catch them.