806 



BIOLOGY OF THE SEAS OF THE U.S.S.R, 



P. Ushakov (1953) divides the bathyal into two parts: an upper (200 to 

 750 m), and a lower (750 to 2,000 m), giving a colourful description of the 

 peculiar fauna of the upper zone of the Sea of Okhotsk bathyal (Fig. 406, 



Fig. 400. Quantitative distribution (in g/m 2 ) of sessile sestonophages of hard soils 

 of Sea of Okhotsk (Savilov). 



1-5). 'The great Balanus evermanni forms large colonies on the steep rocky 

 slopes . . . many Octocorallia, and in particular the large sea-pen Pavonaria 

 finmarchica, forming an original biocoenosis with the long-armed ophiura 

 Aster onyx loveni. Immense arboreal colonies of Primnoa resedaeformis f. 



