The pale referred to in the idiom is usually taken to mean the English Pale, the part of Ireland under English rule, and therefore, as perceived by its rulers, within the bounds of civilization. pale see: beyond the pale
For the food, see Salmon as food. The chum salmon (Oncorhynchus keta) is a species of anadromous fish in the salmon family. It is a Pacific salmon, and may also be known as dog salmon or keta salmon, and is often marketed under the name silverbrite salmon.
Betta fishes have a variety of tail types. One simple way to identify a Betta fish is by the length of its tail. Short tails are common in wild type Bettas, as well as Bettas that are bred to fight. 1  Short-finned Bettas, which are also called Plakats, are sometimes bred to have D-shaped tails.