Some information on Diver Cats!
There's two subsets of them, Sea-Divers and Cave-Divers, they all live together though and share the spoils of their expeditions. They will sell or trade the items they find to the clans (which are often used as status symbols among senior warriors and high ranks, or gifts of love/affection) in exchange for hunting rights and protection from outside threats.
Cave-Divers collect stones and gemstones in mines that they've dug on the cliffsides and through caves.
Sea-Divers collect shells and pearls and clams and other hard to get treasures from the ocean!
They are very hardy and loyal to each other, but their adventurous spirits can't easily be tamed, leading to them either venturing further away from the coastline, or possibly joining the clans themselves if they see fit.
Though, they are a fully functioning and independent group on their own, and find joy in their work as it brings them closer to each other, and gives them a connection to the earth.