Alepocephaloidei
Quick Summary
The Alepocephaloidei, commonly known as slickheads, are a superfamily of deep-sea fishes belonging to the order Salmoniformes. These fish are found in nearly all oceans, inhabiting depths of up to 5,500 meters (17,800 feet) or more.1
Slickheads are characterized by their dark, soft, and herring-like appearance, though species vary significantly in structure. Some species possess light-producing organs. Key features of the family include the absence of a swim bladder, the presence of a lateral line, and a dorsal fin positioned far back and above the anal fin.1
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