Do black moors have a good memory?

All fish have a memory commensurate with their need to survive. They will remember hiding places in their environment, they will remember the place where they are fed and the person doing the feeding. They will also remember what a net is and does and will learn to hide if they see one comming. There is now scientific evidence that goldfish (Black Moors are a kind of goldfish) have good memories and learn quickly under laboratory conditions.