Phemblufs are large, blue fish that live in the deeper, frozen parts of the northern oceans. Phemblufs average two to three feet long and have a long black, snout with a mouth full of razor-sharp teeth that can drill through ice with ease. Phembluf usually live in packs of 5 to 20, hunting and killing larger fish and aquatic mammals. They also enjoy eating seaweed and underwater plants. A chemical reaction in their blood keeps their skin in a perpetually-frozen state; however, upon death, their skin will melt and release their innards as a thick slime, which is extremely harmful to most aquatic ecosystems.