This is called "anchor ice". I just looked it up because the rivers in Missoula have been doing this, this winter. Looking up the term anchor ice will get you some good pictures. There is a great pdf of anchor ice in the roaring fork valley (Colorado) that explains how it forms.
salmon
Mostly salmon.
Salmon are mostly raised in fish farms. A decrease in the salmon population due to overfishing has caused fresh caught salmon to become seasonal, rare, and very expensive.
The landscape is mostly formed by the
Salmon and smelt.
They mostly ate salmon but they also ate Cod and Eulachon fish they also ate many more, but salmon is what they mostly ate
Mostly fishing, especially salmon fishing.
salmon berries nuts
Salmon would be mostly protein, don't think it'll have any carbs at all.
The landscape is mostly formed by the
Some fish concentrate the natural pigments present in phytoplankton, which are at the bottom of the food pyramid. This is the case for some salmon species. Commercially-reared salmon have such pigments added to their feed, so their flesh is red, even though their wild cousins' flesh is mostly white. Marketing has determined that consumers expect salmon to have red flesh.
Mostly bears when they migrate upstream but they also have enemies such as salamanders.