Sicyonis denisovi N. Sanamyan, K.

Sicyonis denisovi N. Sanamyan, K. View in CoL Sanamy- an, Galkin, Ivin et Bocharova, 2021

Fig. 2K View Fig .

Sicyonis denisovi Sanamyan et al., 2021: 391 View in CoL .

MATERIAL. LV-75-1, 55.4246ºN 167.2903ºE, depth 1061 m, sample 1, one specimen collected; LV-75-9, 55.4286ºN 167.2775ºE – 55.4225ºN 167. 2760ºE, depth 1000– 720 m, one specimen collected (sample 2) and three specimens photographed; LV-75-17, 55.4661ºN 167.2761ºE – 55.4447ºN 167. 2626ºE, depth 2488– 1835 m, six specimens photographed; LV-75-18, 55.4292ºN 167.2697ºE – 55. 4290ºN 167.2706ºE,depth 1040– 1030 m, three specimens photographed; LV-75-21, 55.4818ºN 167. 2573ºE – 55.4633ºN 167.2547ºE, depth 2841– 2294 m, four specimens photographed.

LV-82-1, 55.4171ºN, 167.2773ºE, 386 m, sample 1, one specimen collected; LV-82-7, 55.3689ºN 167.2659ºE – 55.3740ºN 167.2653ºE, depth 1010– 785 m, two specimens collected (sample 1) and twelve specimens photographed; LV-82-8, 55. 3750ºN 167.2643ºE – 55.3795ºN 167.2620ºE, depth 755– 539 m, four specimens photographed.

REMARKS. 37 specimens of this species were photographically documented during two expeditions in 2016 and 2018 at the depths 386–2841 m on the top of the Piip Volcano and its southern slope, five of them were collected. This large (up to 20– 25 cm in diameter of the tentacular crown) sea anemone lives on the stones. The color is usually plain, from orange to yellow-brown or reddish-brown, the oral disc may be brighter or darker than the column. The tentacles are numerous, up to 200 or more, arranged up to five cycles. This species does not form large settlements, and specimens often occur solitarily on large distance one from another, but on these depths S. denisovi appears to be the most common species of large sea anemones in the southwestern part of the Bering Sea. It was recorded on the stones surrounded by bacterial mats in the vicinity of cold seeps and also in communities of glass sponge Farrea spp. at the depths 1750– 720 m (see Rybakova et al., 2020). In the original description (Sanamyan et al., 2021) depth range is given only for collected specimens (386–1061 m). Here we report deeper records of this species (1835–2841 m) on the basis of underwater photographs on which this species may be recognized.