ш 



I 



32 



E3U 



Fig. 403. Total composition of 

 Sea of Okhotsk benthos accord- 

 ing to its biomass (Savilov). 1 

 Polychaeta ; 2 Crustacea ; 3 Mol- 

 lusca; 4 Echinodermata ; 5 

 Porifera, Hydroida, Bryozoa and 

 others. 



Fig. 404. Chart of main bottom-living groups of Sea of Okhotsk. 

 1 Ophiura sarsi ; 2 Brisaster latifrons ; 3 Pot ami I la symbiotica ; 4 Lamel- 

 lisabella zachsi; 5 Temperature always below freezing point; 6 Near- 

 bottom isotherm 0° (winter) ; 7 Near-bottom isotherm 2° ; 8 Near- 

 bottom isoxine 15 per cent (Ushakov, 1953). 



