Abstract: To identify suitable attachment materials for the veined whelk, Rapana venosa (Valenciennes, 1846), laboratory experiments were conducted to evaluate adult preference among basalt fiber (BF), polypropylene (PP), polyethylene (PE), and polylactic acid (PLA), as well as attachment behavior on these materials. Surface roughness was quantified for each material, and the relationship between surface roughness and attachment performance was analyzed. The results showed that: (1) BF had the highest surface roughness, being 3.91, 3.23, and 1.14 times those of PP, PE, and PLA, respectively (P<0.05); (2) based on phase classification of the population-level time series of attachment rate, the BF group exhibited the shortest exploration phase and entered the stable attachment phase earliest; (3) the BF group showed the highest initial attachment rate, approximately 1.18, 1.82, and 1.33 times those of PP, PE, and PLA, respectively, and locomotion speed differed significantly among material treatments (P<0.05); and (4) BF exhibited superior attachment performance in terms of final attachment rate, attachment force, and attachment strength (P<0.05). Specifically, compared with PP, PE, and PLA, BF showed final attachment rates that were 1.28, 2.16, and 1.37 times higher, respectively; the corresponding values for attachment force were 1.77, 1.66, and 5.09 times higher, and those for attachment strength were 1.67, 1.83, and 4.51 times higher, respectively. These results indicate that basalt fiber is a promising attachment material for enhancing the attachment rate and stability of R. venosa, with potential applications in resource restoration and marine stock enhancement.