Definition of "herling" [her•ling]

• The young of the sea trout. (noun)

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)

• "The life-history of sea-trout is much the same as that of salmon, and the fish on their first return from the sea in the grilse-stage are called by many names, finnock, herling and whitling being perhaps the best known."
• "November, when the various streams and tributaries are taken possession of both by sea-trout and herling, spawning in deep or shallow water, according to their individual size."