Extended Data Fig. 5: Ciliary wave velocity remains unchanged with proximity.

Kymographs showing the frequency of the metachronal waves for the two individuals in the pair shown in Fig. 2a,b. The frequency of the metachronal wave for the left and the right S. coeruleus in the pair remains unchanged as the distance, Δ, between the two individuals changes from (a) Δ = 52 µm (left: 16.7 Hz, right: 15.4) to (b) Δ = 246 µm (left: 16.6 Hz, right: 15.2 Hz).