The hydrodynamic characteristics of minnow netting composed of high-strength polyethylene (Dyneema) with diŠerent types of twine diameter and mesh size were evaluated through experiments conducted in a ‰ume tank. The drag coe‹cient C D90 of Dyneema minnow netting set normal to the water ‰ow was 8 and 25 smaller than that of minnow netting made of the conventional materials of polyamide and polyvinyl alcohol, respectively.The drag coe‹cient C D0 of minnow netting set parallel to the water ‰ow showed a slight diŠerence between the materials. Additionally, C D90 and C D0 were expressed as functions of Reynolds number and mesh factor a. Furthermore, the drag and lift coe‹cients of minnow netting set at various angles to the water ‰ow were estimated by empirical equations as functions of C D90 , C D0 and attack angle u. Table 1 に示す。