Why this knive earns its place
Ten inches is the long end of the cook's knife range, and length buys you a stroke rather than a saw. A blade this size draws through a side or a large piece in one pass instead of three, which leaves a cleaner cut face and does less damage to the flesh on the way through. It reaches across a full board width, so you can portion along a line without repositioning the work every second cut, and it keeps your knuckles well clear of what your guiding hand is holding. The trade is space: a 10in blade wants a proper board and room to swing, and it is not the knife to reach for on a crowded pass.
The blue handle is the other half of it. Blue is conventionally assigned to raw fish in UK coded sets, and Prepara put the case plainly — coded knives exist to support the hygiene routine a kitchen already runs. Raw fish is exactly the work where that discipline earns its keep, because whatever the blade touches next will often not see another heat step. A fish section is also permanently wet, so drying the blade as you finish rather than leaving it lying in the sink matters more here than on a dry bench. Steel it at the start of the session and again when it starts sliding rather than biting.
