The highfin dogfish, Centroscyllium excelsum, is a sleeper shark of the family Dalatiidae, found in the northwest Pacific Ocean on the Emperor Seamount chain between latitudes 50 and 38°N, at depths between 800 and 1,000 m.
The region has a south west extreme of just under 50 degrees north and a northern extreme of 81 degrees north.
Paruroctonus boreus, sometimes called the "Northern Scorpion", is a species of scorpion of the family Vaejovidae that can be as far north as 50° N.
In July of that year it was adapted into a theatrical performance and was performed at the Imperial Garden Theater under the title 北緯五十度以北 (North of latitude 50 degrees north).
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