A helpful man or woman.
Dream dictionary: Mackerel dream meanings
Dreaming of this fish warns us that someone is exploiting us professionally and we have not noticed this yet.
…Here again the subject of fish-dreams is a very large one, far too large for me to deal with very exhaustively. I must therefore, as in the case of the bird and dog dreams, be content with a few selections.To dream about gold and silver fish is distinctly fortunate, and points to legacies and presents, chiefly monetary.To dream about whales is indicative of impending law suits, debts, bankruptcy, and pecuniary difficulties.To dream about sharks portends death, illness, or an enemy. To dream about mackerel imports coming domestic bothers; about herring, pleasures in the shape of visits to friends or places of entertainment; about sprats, children’s ailments; about pike, quarrels; about flat fish (generally speaking), misfortunes in some form or another, but seldom deaths; about salmon, unexpected success; happiness, presents, and the forming of sound friendships; about minnows and sticklebacks, petty quarrels, and disappointments; about eels, ruptures in love affairs,…