[2] He has been identified with the Peter Schaeyenborch who was in 1610 registered with the painters' guild (the Guild of Saint Luke) in Antwerp (Antwerpse Sint-Lucasgilde [nl]) as an apprentice of Daniël Christiaenssen.
In 1656 and 1657, the executors of the estate of Johan van Nordingen de Jonge (i.e. 'the Younger'; 1625/26-1656) paid him 48 and 56 guilders respectively for two paintings commissioned before van Nordingen's death.
[1] Van Schaeyenborgh, Pieter de Putter and Jan Dirven were among the earliest Netherlandish painters to specialise in still lifes of fish as the main subjects of paintings rather than as incidental features in larger compositions.
[2] In 2019, a group of van Schaeyenborgh's paintings was exhibited at the Stedelijk Museum Alkmaar.
The catalogue praised his depictions of fish which look as if they have just been caught, with beautiful scales and water droplets you can almost touch.