| The Finnish area just east of Bothnian Bay stand out as the largest plain in the Nordic countries. |
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| The dependence of organohalogen compounds concentrations on herring age and size in the Bothnian Sea, Northern Baltic. |
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| The Bothnian Sea, the basin south of Kvarken, freezes on average in late February. |
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| The northern part of the Baltic Sea is known as the Gulf of Bothnia, of which the northernmost part is the Bay of Bothnia or Bothnian Bay. |
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| Clones seem to be absent in the southern Baltic Sea, less common in Estonia but very common in Gulf of Finland and in the Bothnian Sea. |
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| In recent years prior to 2011, the Bothnian Bay and the Bothnian Sea were frozen with solid ice near the Baltic coast and dense floating ice far from it. |
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| Freezing begins in the northern extremities of Gulf of Bothnia typically in the middle of November, reaching the open waters of the Bothnian Bay in early January. |
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