☛ University of Strasbourg Digital Collection: “Esox Lucio / Der Hetch / Le Brochet / The Pike” in Ökonomische Naturgeschichte der Fische Deutschlands [Tome 1] by Marcus Elieser Bloch, plate no. 32 (call number H127116-1/0337). Public domain.
The same illustration can be downloaded at the University Library Heidelberg.
In the first German edition (for what I understand) illustrations were published alongside the text. In the subsequent French editions (see below), illustrations were published separately in a single book.
A slightly different version of the Esox lucius illustration can be found at Gallica, the Bibliothèque Nationale de France’s digital library. Gallica’s version of the illustration comes from a French edition published between 1795 and 1797. This single volume consists only of 431 of Bloch’s illustrations, without the text: Illustrations de Ichtyologie ou histoire naturelle générale et particulière des Poissons.
In German, the accompanying text for the Esox lucius runs from page 291 to page 300. The text from the French edition can be found at the Biodiversity Heritage Library: it runs from page 336 to page 346 (PDF).
For more information about Bloch’s Ökonomische Naturgeschichte der Fische… see BibliOdyssey: “Bloch Fish”, May 16, 2011.