The animal on the cover of Juniper Networks Warrior is a seawolf, or Atlantic wolffish (Anarhichas lupus). The seawolf is known by many names: Atlantic catfish, ocean catfish, devil fish, wolf eel, or sea cat. This marine fish is the largest of the wolffish family Anarhichas. Despite its frightening appearance, the seawolf poses a threat only when it feels threatened, often when caught out of water. The National Oceanic and Atmospheric Administration’s National Marine Fisheries Service has named the seawolf a Species of Concern due to its rapidly depleting numbers—the result of bycatch and overfishing.
The wolffish can live close to a mile below sea level in temperatures below 40 degrees Fahrenheit. To survive in such low temperatures, the seawolf produces a natural antifreeze that keeps its blood moving fluidly. The seawolf plays an important role in its environment, keeping other populations—sea urchin, green crabs, and other bottom-dwelling species such as cod—in check.
The most notable feature of the seawolf is its large teeth and strong jaw, used to eat hardshell mollusks, crustaceans, and echinoderms. Other fish are safe from the jaws of the seawolf, but cockles, sea clams, large hermit crabs, starfish, sea urchin, and green crabs are not.
The cover image is from Wood’s Animate Creatures. The cover font is Adobe ITC Garamond. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont’s TheSansMonoCondensed.