This page presents the original field documentation of the 2025 mass mitten crab (Eriocheir spp.) migration event at the Bitan Weir, Taiwan.

Visual materials from this documentation were subsequently circulated across multiple Taiwanese news outlets during widespread media coverage of the event. While individual photographer credit was not consistently included in news reports, the imagery originated from a single on-site documentation session conducted by George Kao, PhD.

This page serves as the primary source record for the widely reported “Bitan crab rush” phenomenon and provides ecological and visual context beyond surface-level media coverage.

In September 2025, the Bitan Weir witnessed a historic ecological event: the "Three Waves" of the Japanese Mitten Crab migration.

While news outlets broadcasted the sheer scale of thousands of crabs scaling the weir, my lens focused on the individual struggle within the mass migration. This macro portrait (above) captures the determination of a single life, while the footage (below) documents the collective power of nature utilizing the new eco-fishway.

This project serves as visual proof: Nature has an algorithm, and when we engineer with respect, life returns.

• Client: New Taipei City Water Resources Bureau (新北市水利局)

• Collaborator: Prof. Tseng Ch'ing-Hsien (清華大學曾晴賢教授團隊)

• Role: Principal Videographer / Ecological Documentation