Merfolk

The merfolk are an aquatic humanoid race that inhabit the depths of the Aeliph Sea. Little is known of their habits under the waves, as the merfolk are quiet and prefer to stick with their own. The only official point of contact we as land dwellers have with them is a small island in the middle of the sea which is the designated trading point. Every so often, sailors will sail to the island looking to trade. The merfolk leave an updated list of what they are willing to part with and what they are willing to give in return; those who have the items needed can drop them off in exchange. Efforts to haggle their material prices, or even the goods they peddle, have all been met with silence.
Some sailors try to communicate with the merfolk, as it seems they speak a language commonly spoken by sentient aquatic creatures known as Aquan. Some chat in return, and are known to engage in small talk.
Merfolk commonly trade away marine goods of which they have in abundance in exchange for items that one would seem to have a difficult time acquiring underwater. Examples of goods they give out include sea shells, marine ore deposits, pearls, coral, fish and other caught creatures, high quality caviar, perfume ingredients, tools and weapons such as tridents made of bone. Examples of items they are known to take include refined metal ingots, meats and products from land animals, wools and other fibres, wood and various foods such as grains, sugar and land grown fruits and vegetables.