Table 2. Identity of the dominant species in the assemblages.

Region	Dominant species	% total cells	No. other species in their size-class	Apparent range
East Sea/Sea of Japan	Proplectella expolita	65	3	East Sea/Sea of Japan only
North Pacific	Ptychocylis obtusa	45	0	All
Bering Sea	Codonellopsis frigida	45	2	All but High Arctic
Chukchi Sea	Acanthostomella norvegica	52	1	All
High Arctic	Ptychocylis obtusa	86	0	All

Note that dominants accounted for a large portion of the population in all 5 systems and most had a wide apparent range.