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Inspired by the versatile foraging process of predators, this work demonstrates that micromotors doing spontaneous multipattern motion with microvortex can greatly enhance \u201con\u2010the\u2010fly\u201d enrichment, demonstrated by highly sensitive surface\u2010enhanced Raman scattering detection. It leverages an axis\u2010asymmetric bowl\u2010shaped structure and the nonlinear Ag\u2013AgCl reaction, realizing alternating low\u2010velocity swinging forward and accelerated steering motions for prolonged interaction and large work area. Moreover, the bowl\u2010shaped microstructure bestows a micro\u2010vortex above the Ag side due to the competition of electric potential and pressure gradient, also extending interaction time during the acceleration. Consequently, it exhibits at least an order of magnitude larger enhancement of detection signals than the counterparts. 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