Fish knife

At the turn of the 19th century, the originally symmetric and broad blade of the fish slice evolved into a scimitar-like shape, with the knife often marketed as a matched set with a four-tine serving fork.

[5] Use of the knife came from the rich commoners, with high society at first frowning upon it as a too specialized tool (and the one they were also missing in their hereditary silverware sets).

"[7] Use of silver as a material for the knife was the only available means (before the arrival of the stainless steel) to enable pairing of lemon and fish without encountering a metallic taste.

The modern knives are about 8 to 9 inches long, have a dull blade and frequently a notch close to the sharp tip that can be used to separate the bones from the flesh of the fish.

[10] If the fish is served already without bones, knife is either used to "flake" the pieces onto the fork, or its use can be avoided altogether, known as "American style".

Four kinds of fish knife (two left ones are for serving) and a fish fork for Lloyd Triestino First Class dining (1931)
Fish serving cutlery (end of 19th century)
Gold-plated fish knife with the distinctive notch at the top