  Tissue organization plays a crucial role in morphogenesis, wound healing and
cancer metastasis. Hydra, known for its regenerative capabilities, serves as an
excellent model for studying cellular structures, particularly in pattern
formation and the diffusion of cell clusters. Established experimental
protocols enable the examination of regeneration and tissue segregation through
optical microscopy. Recent experiments challenge previous theories by
suggesting that cell collective behavior is a key factor in hydra cell
aggregate organization. Utilizing image treatment techniques on fluorescent
images from Hydra's segregation experiment, we track endoderm cell clusters and
investigate the relationship between their diffusion constant and cluster size.
In contrast to results observed in non-active matter, we discover a nearly
constant dependence of diffusion on cluster mass. This finding contributes to
understanding the rapid segregation observed in recent experiments and holds
implications for general cellular tissue processes.
