The Alaskan halibut and king crab fisheries illustrate how ITQs can change behaviour.

ECONOMIST: Fishing and conservation

Beneath the freezing surface of Jarfjord, east of Kirkenes, the red king crab stakes a strong claim to be Arctic Norway's most unusual inhabitant.

BBC: The perfect trip: Norway

Every year, each female king crab gives birth to around 10, 000 surviving offspring and there are now 20 million in the Barents Sea alone.

BBC: The perfect trip: Norway

Snails, brittle stars, sea spiders and some marine worms have evolved without armor and other protections they would need to survive alongside the king crab.

CNN: Ice shelf collapse: What does it mean?

We've made stuffed blue crabs with pork, fried Jonah crab claws and spicy crab noodles with king or Dungeness crab.

WSJ: Endless-Summer Baked Blue Crab