Sonic Octopus, Ecological AI draws a connection between the neural network of the octopus and hurisori, the traditional labour songs of anchovy-fishing communities in Busan’s Daedaepo area. An octopus does not move under the control of a single brain alone. Instead, its intelligence is distributed across a central brain and the neurons running through its eight arms. Each arm functions as a semi-autonomous cognitive unit while remaining interconnected with the whole. Similarly, hurisori functions without a single conductor or a fixed score. Participants respond continuously to one another’s voices and movements, collectively improvising songs in response to changing situations. In these two systems, Cho discovers the possibility of a collective intelligence and communal body that operate without centralised instruction. The work takes the form of a parade involving artists, performers, and the public. As sound, movement, collaboration, and social cohesion move through urban space, they create a living ecology.