This store is a small one room stone building with wares laid about on tables.  One can see fishing poles, wooden buckets with dirt and bait inside, along with some mounted trophies.
Fishing Store, Port
mermaid
fisherman
I ride in boats to catch fish. I catch fish in the ocean. I usually get a boat full of fish.
Woah I did not see you there! I will put you back immediately. Like you did those fish hanging on your wall!? Those hanging on my wall did not speak to me like you did! Well.... at least they aren't dolphins.... Say, what's this? That is money. I get that when I take the fish to the city. It's so shinny! I am glad you like them you can have those. Here, a gift for you too. Say, what's a "city"? A city is a place where thousands of people live together. People are like you, with the strange land tails? Land tails? Oh you must mean my legs. Every human has them... well not every human. Wow! Strange! Yeah not every mermaid has... Shells.