Refers to a person or shop that sells fish. Cross-referenced with 魚屋 (さかなや), which is the more common term.
See also: 魚屋
I bought fresh fish at the fish dealer in the market.
Compound of 魚 (さかな, 'fish') and 店 (だな, 'shop'). The reading だな is a rendaku form of たな.