Well, that's a funny thing, _some do_, or at least to the point where it makes no odds. I was touring around Iceland (a country I can highly recommend visiting) and we were at Jokulsarlon [0] (where the icecap carves into the ocean) and there were lots of what looked like dead fish there. They basically swim in from the ocean, seemingly catch hypothermia, and are a feast for seals.

The local "fishermen" came along, with wellies on, waded into the water, literally kicked the fish out onto the shore. One of the fishermen was kind enough to give us one of their catch. It was tasty.

Go to Iceland, it's awesome.

[0]http://blog.psdavey.com/2014/08/25/down-the-coast-to-jokulsa...