“…Complex topography and a convoluted oceanic current system, together with the intricate history of surrounding seas, have shaped their marine biodiversity, expressed in the astonishing richness and zoogeography pattern of multiple benthic groups (Grebmeier et al, 2006;Renema et al, 2008;Leprieur et al, 2016;Kaiser et al, 2018;Bober et al, 2019;Saeedi et al, 2019;Jazḋzėwska et al, 2021aJazḋzėwska et al, , 2021b. The series of R/V Vitjaz historic expeditions triggered the study of NW Pacific deepsea macrofaunal communities (Sirenko, 2013;, but results of the recent investigations suggest that Peracarida taxa previously considered rare and unique may be in fact frequent and abundant on bathyal and abyssal ecosystems (Larsen and Shimomura, 2007;Brandt et al, 2010;Golovan et al, 2013;Malyutina et al, 2015;Jazḋzėwska and Mamos, 2019;Saeedi et al, 2019;Jazḋzėwska et al, 2021a).…”