Bait and Fish
In Minethings, bait can be used to catch fish, which can be used for certain melds. To catch fish, you have to be a Fisherman. Bait can be acquired by mining items in a bait mine; different colors of bait catch one of its' corresponding color fish or a sunken item of it's color or rarer. Note: Only yellow bait can fish up grey items. Fish can be either sold or made into melds, and can be very profitable as long as you don't get pirated.
All bait is acquired from a bait mine, which you can either purchase with credits from the shop, or with gold from other players.
While fishing, you may find that some of your bait has been replaced with items. This is called finding treasure, and it happens when your ship tries to fish while it is above a shipwreck. If that shipwreck happened to have items, you can fish them up (1 item per bait. You'll also only fish up treasure of the same color or rarer, and only yellows can fish up greys).