Salmon divergence. Salmon eggs are laid in freshwater streams typically at high latitudes. The eggs hatch into alevin or sac fry. The fry quickly develop into parr with camouflaging vertical stripes. The parr stay for six months to three years in their natal stream before becoming smolts, which are distinguished by their bright, silvery colour with scales that are easily rubbed off. Only 10% of all salmon eggs are estimated to survive to this stage. The smolt body chemistry changes, allowing them to live in salt water. While a few species of salmon remain in fresh water throughout their life cycle,
The Salmon of Doubt commissioned a third Dirk Gently six-part radio series for broadcast in mid-2010, based on the uncompleted chapters of "The Salmon of Doubt", and written by "Spice World" writer Kim Fuller. These plans have been dropped in favour of creating a television adaption of the two complete novels. The Salmon of Doubt The Salmon of Doubt: Hitchhiking the Galaxy One Last Time is a posthumous collection of previously published and unpublished material by Douglas Adams. It consists largely of essays about technology and life experiences, but its major selling point is the inclusion of the incomplete novel on which Adams was