The Silver or Coho salmon (Oncorhynchus kisutch) has silver lights on its sides, while its back is deep blue with some irregular black spots. It lives principally on the coast of British Columbia in Canada. The young Coho are very aggressive and territorial. Their brilliant colours include an orange mark on the anal fin. The young Coho spends its first year in rivers and then goes to the Ocean where it stays at least 18 months before going back up the river in which it was born, so as to spawn. When laying her eggs, the female hollows out 5 'nests' in the sand and deposits between 800 – 1000 eggs in each one.