THE BLACKFISH Family XVIII. Dalliidae This family contains but one genus and a single species, Dallia pectoralis Bean, known as the Alaskan blackfish. It is found only in the streams and ponds of northern Alaska and Siberia, abounding in sphagnum ponds and found in countless numbers "wherever there is water enough to wet the skin of a fish." It forms one of the chief articles in the food of the natives who use it also as food for their dogs. It feeds largely upon small plants, worms and crustaceans. Its vitality is extraordinary. It will remain frozen in baskets for weeks and, when thawed out, will be as lively as ever. Turner mentions one swallowed frozen by a dog, thawed out by the heat of the dog's stomach, and vomited up alive. Length about 8 inches.