By fall, juvenile herring are fingerlings, meaning they are about the size of fingers. These juveniles have developed scales and working fins and resemble the adults in appearance.  Technically, the juvenile stage lasts until the fish is fully grown, sexually mature, and interacting with other adult fish.  At this time, the juveniles move into deeper water where they are spatially separate from the adults. After 2 to 3 years, they emerge as mature herring and then join other schools of adult herring.

    Fingerling herring

Fingerling herring. Photo: Wikipedia

Monday, October 7, 2013