Dungeon World: Leviathan
Moderate – Most mundane items are available. Some types of skilled labourers.
Shrinking – The population is less than it once was. Buildings stand empty.
Watch – There are a few watchers posted who look out for trouble and settle small problems, but their main role is to summon the militia.
Power (Divine) – The Merfolk have built the town around a large and ancient church.
Trade – Two nearby Merfolk villages.