Lake sturgeon
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The lake sturgeon, also known as the rock sturgeon, is a North American temperate freshwater fish, one of 27 species of sturgeon. Like other sturgeons, this species is a bottom feeder and has a partly
Lake sturgeon, Batchawana Bay, Lake Superior (live released)
Lake sturgeon
Juvenile lake sturgeon Goulais Bay, Lake Superior
Juvenile lake sturgeon Goulais Bay, Lake Superior
Isinglass
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Isinglass is a form of collagen obtained from the dried swim bladders of fish. The English word origin is from the obsolete Dutch huizenblaas – huizen is a kind of sturgeon, and blaas is a bladder, or
Lake sturgeon
…considered "Vulnerable" by NatureServe. This sturgeon is a valuable gourmet food fish, as well as a source of specialty products including caviar and isinglass. "In 1860, this species, taken on incidental catches of other fishes, was killed and dumped back in the lake, piled up on shore to dry and be burned…
Isinglass
Swim bladder of a rudd (Scardinius erythrophthalmus)
Adding finings to a cask of beer