
Halocynthia roretzi (Drasche, 1884)
Sea pineapple
Length: 7 cm
Locality: Red Rock spot, Kitakoura, Sado Is. Depth: 23 m
Environment: rocky reef
Water temperature: 19°C
Date: Jun, 2011 Photographer: Satoshi Awata
| Phylum | Chordata |
| Subphylum | Urochordata |
| Class | Ascidiacea |
| Order | Pleurogona |
| Family | Pyuridae |

Length: 12 cm
Locality: Mushizaki, Sado Is. Depth: 10 m
Environment: rocky reef
Water temperature: 13°C
Date: Jan, 2015 Photographer: Satoshi Awata

Length: 9 cm
Locality: Mushizaki, Sado Is.
Environment: rocky reef
Water temperature: 14°C
Date: Dec, 2013 Photographer: Satoshi Awata