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Figure 3. Petersen's net for young fish devised by C. G. Johan Petersen in1902. Left: view of the net. Right: view of the connectors. This net wasdesigned to capture the young of commercial species for further study. It wastested about 1902 at the Small Belt on board the SALLINGSUND, the shipof the Danish biological station (Image credit: Oceanographic Museum of Monaco | Y. Berard)