Sarah Moulton had a famous New York fishmonger on
Cooking Live years and years ago. He had a knife that looked very (in my mind exactly) like the knife in Bruegel's
Big Fish Eat Little Fish. Like a chef's knife with a straight back and a trailing point, which would be even more like a Searles Bowie.
I actually called in, I actually got through, and my answer to, "What kind of knife is that" was, "I don't know; you'll have to look for a knife like it". I wrote a scathing letter that probably got me onto Sarah's "do not answer" list. Twenty years later, I still don't have a name for the style or a maker who makes it.
Maybe that NY fishmonger is still alive.
[It just occurred to me to search "fishmonger knives". Close but too deep-bellied.]
This is very close:
https://www.mychefknives.co.uk/32-d...rmo-black-fish-knife-serrated-blade-35cm.html
Except for the serrations, which I think are optional.
There, I feel better.
Opinel has a straight-backed chef's, but only 8"(?) (20cm).
Anyway, you probably want a clip-point.