Experimental investigation of preferential concentration in zooplankton swimming in turbulence François-Gaël Michalec, Olivier Praud, Sébastien Cazin and Eric Climent Eur. Phys. J. E, 45 2 (2022) 12 Published online: 07 February 2022 DOI: 10.1140/epje/s10189-022-00167-5