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Baltic Herring (Photo: Markus Vetemaa)
The Baltic herring is the dominant fish species in the Baltic Sea. They occur in large shoals throughout the Baltic except the Curonian lagoon.

The herring spawn in May and June. They usually lay their eggs on brown algae like Fucus and Furcelaria. The number of eggs may reach up to 65 thousand per individual. The most important spawning sites are in the Parnu Bay, near Salacgriva, near Nida and near Klaipeda.

The herring stock in the Baltic proper had been steadily declining for a couple of decades but now it’s on the rise again. Conservation of spawning sites is fundamental for the herring stocks to thrive.
Baltic Herring (Clupea harengus membras)