
Halocynthia ritteri (Oka, 1906)
Length: 8 cm
Locality: Mushizaki, Sado Is. Depth: 6 m
Environment: rocky reef
Water temperature: 16°C
Date: Nov, 2017 Photographer: Satoshi Awata
| Phylum | Chordata |
| Subphylum | Urochordata |
| Class | Ascidiacea |
| Order | Pleurogona |
| Family | Pyuridae |

Length: 8 cm
Locality: Kitakoura Port, Sado Is. Depth: 2 m
Environment: quay wall
Water temperature: 10°C
Date: Feb, 2014 Photographer: Satoshi Awata

Length: 7.5 cm
Locality: Kitakoura Port, Sado Is. Depth: 2 m
Environment: quay wall
Water temperature: 9°C
Date: Mar, 2014 Photographer: Satoshi Awata