The Bering Sea/Aleutian Islands “other flatfish” group have typically included those flatfish besides northern rock sole, yellowfin sole, arrowtooth flounder, Kamchatka flounder and Greenland turbot. Flathead sole (Hippoglossoides elassodon) were part of the other flatfish complex until they were removed in 1995, and Alaska plaice was removed from the complex in 2002, as sufficient biological data exists for these species to construct age-structured population models. In contrast, survey biomass estimates are the principal data source used to assess the remaining other flatfish. Although over a dozen
species of flatfish are found in the BSAI area, the other flatfish biomass consists primarily of starry
flounder, rex sole, longhead dab, Dover sole and butter sole. A full list of the species in the other flatfish
complex is shown in Table 11.1. At present, no evidence of stock structure is evident for these species in
the Bering Sea/Aleutian Islands region, although no formal genetic or tagging study has been conducted
on these species in this region.