A report on 8 June 2009 mentioned that a purple king crab were caught off Skogsvåg at Sotra south of Bergen in south Norway. An essential normal predator of your red king crab, the giant Pacific octopus (Enteroctopus dofleini, formerly termed Octopus apollyon), isn't going to arise in European waters. https://francesr245non7.birderswiki.com/user