Pocket Salmon appears as 'Pocket Salmon' in the purchase from SDB window but is named 'Pocket Salmen' in my inventory, and in the info its 'Pocket Salmon' again.
Perhaps this is intentional as it appears to be happening to Salmon that has been renamed (I'm assuming here).
There are 1500 odd 'Pocket Salmen' in my tower on floor 3 (not for sale) should staff want to look/require any. :)