For new anglers and some more seasoned ones a brief lesson on the difference in the appearance between a Kelt and a Fresh fish.

Kelt

Kelts are salmon which have spawned. Usually identified by the thin shape, distended vent and presence of "gill maggots" on the red gill filaments,
they are often encountered by anglers in spring when they regain a silvery appearance and can be mistaken for fresh run Springers. Kelts must be returned unharmed to the water.

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Fresh-Run Salmon
Recognised by the pristine condition and bright silver flanks. Fish straight from salt water have loose, easily detached scales and many carry sea lice which drop off within a few days.
Hen salmon (illustrated) have a tiny kype on the lower jaw but unlike cocks they retain normal head proportions while in the river. First photo shows fresh sea-lice.

Autumn 2008 088cache_8315171Atlantic Salmon River Tay Guide