I finished a ko deba just recently for smaller sashimi fish (we have a fish called a koheru here looks similar to a mackerel but is tastier sashimi) , awesome for the task and pretty quick & easy to makeI am going to leave this two links as the size of the fish might be appropriate, check the size of the knife, the difference in technique and the cleanliness of the cut.
I used 3mm stock with almost no taper and pretty much a high scandi grind. Rides the bones well.
