  This paper presents an interactive artwork, "Holon", a collection of 130
autonomous, cybernetic organisms that listen and make sound in collaboration
with the natural environment. The work was developed for installation on water
at a heritage-listed dock in Melbourne, Australia. Conceptual issues informing
the work are presented, along with a detailed technical overview of the
implementation. Individual holons are of three types, inspired by biological
models of animal communication: composer/generators, collector/critics and
disruptors. Collectively, Holon integrates and occupies elements of the
acoustic spectrum in collaboration with human and non-human agents.
