<P> The Aleutian Islands port of Dutch Harbor, Alaska, is the base of operations for the fishing fleet . The show's title derives from the inherent high risk of injury or death associated with the work . </P> <P> Deadliest Catch premiered on the Discovery Channel on April 12, 2005, and currently airs in over 200 countries . The first season consisted of ten episodes, with the finale airing on June 14, 2005 . Subsequent seasons have aired on the same April to June or July schedule every year since the original 2005 season . The 13th season premiered on April 10, 2017 . </P> <P> The series follows life on "the vast Bering Sea" aboard various crab fishing boats during two of the crab fishing seasons, the October king crab season and the January opilio crab (C. opilio; often referred to as "snow crab" or "opies") season . The show emphasizes the dangers on deck to the fishermen (and the Discovery Channel camera crews recording their work) as crews duck heavy crab pots swinging into position, maneuver hundreds of pounds of crab across a deck strewn with hazards (i.e., holding tank hatches, uneven surfaces, maintenance access plates, wet decks), and lean over the rails to position pots for launch or retrieval as galeforce winds and high waves constantly lash the deck . The series also documents the dangers of being on a boat in the Bering Sea, in the midst of some of the coldest and stormiest waters on earth, where even a minor problem may become complex or even catastrophic with the nearest port often hundreds of miles away . </P> <P> Each episode focuses on a story, situation or theme that occurs on one or more boats, while side stories delve into the backgrounds and activities of one or two crew members, particularly the "greenhorns" (rookie crew members) on several boats . The fleet's captains are featured prominently, highlighting their camaraderie with their fellow captains and relationships with their crews, as well as their competition with other boats in the hunt for crab . Common themes include friendly rivalries among the captains (particularly between Sig Hansen of the Northwestern, and Johnathan and Andy Hillstrand of the Time Bandit), the familial ties throughout the fleet (brothers Sig, Norm, and Edgar Hansen, who own the Northwestern; the Hillstrand brothers and Johnathan's son Scott on the Time Bandit; brothers Keith and Monte Colburn of the Wizard), the stresses of life on the Bering Sea, and the high burnout rate among greenhorns . </P>

What kind of crab are caught on deadliest catch