Shinkai Seep Field



Latitude: 11.651οN                  Longitude: 143.049οE             Depth: 5700 m bsl

Shinkai Seep Field (SSF) is an outcrop of serpentinized peridotite hosted hydrothermal vent system in the southern Mariana forearc (Ohara et al., 2011). Methane seepages (Yamanaka et al., 2015) as well as abundant vesicomyid clam communities (Ohara et al., 2011) are found in this serpentinite-hosted hydrothermal vent system. The organisms other than the vesicomyid clams are actiniarians, zoanthids, a Beroe comb jelly, buccinid snails, and galatheid crabs (Ohara et al., 2011).

Table 1: Operations history for Shinkai Seep vent

Ship/ Platform Operation Year Dive Number References
YK15-11 Yokosuka/ Shinkai 6500 Not found 2015 6K-1433 YK15-11 cruise report

Table 2: Activity and Rock types

Activity and rock types References
Activity No active fluid venting Ohara et al., 2011
Rock types Serpentinized peridotite Ohara et al., 2011

Table 3: Vent Biology

General name Phylum Class/Order Family Species References
Actiniarians Cnidaria Ohara et al., 2011
Beroe comb jelly Ctenophora Ohara et al., 2011
Buccinid snails Mollusca Ohara et al., 2011
Galatheid crabs Arthropoda Ohara et al., 2011
Zoanthids Cnidaria Ohara et al., 2011
Vesicomyid clams Mollusca Bivalvia/Veneroida Vesicomyidae Calyptogena (Abyssogena) mariana Yamanaka et al., 2015
Vesicomyid clams Mollusca Bivalvia/Veneroida Vesocomyidae Abyssogena southwardae Ohara et al., 2011;  Krylova et al.,2009

Images: None known

Vent fluid characteristics: None known

Video Links: None known


  1. Krylova, E. M., Sahling, H., Janssen, R., 2010. Abyssogena: a new genus of the family Vesicomyidae (Bivalvia) from deep-water vents and seeps. Journal of Molluscan Studies 76, 107–132.
  2. Ohara, Y., Reagan, M. K., Fujikura, K., Watanabe, H., Michibayashi, K., Ishii, T., Stern, R. J., Pujana I., Martinez, F., Girard, G., Ribeiro, J., Brounce, M., Komori, N., Kino, M., 2011. A serpentinite-hosted ecosystem in the Southern Mariana Forearc. PNAS 109 (8), 2831–2835.
  3. Yamanaka, T., Shimamura, S., Nagashio, H., Yamagami, S., Onishi, Y., Hyodo, A., Mampuku, M., Mizota, C., 2015. A Compilation of the Stable Isotopic Compositions of Carbon, Nitrogen, and Sulfur in Soft Body Parts of Animals Collected from Deep-Sea Hydrothermal Vent and Methane Seep Fields: Variations in Energy Source and Importance of Subsurface Microbial Processes in the Sediment-Hosted Systems. In: Ishibashi, J., Okino, K., Sunamura, M. (Eds.), Subseafloor Biosphere Linked to Hydrothermal Systems: TAIGA Concept. Springer Japan, 105-129.

Website References:

  1. Yokosuka cruise report YK15-11 (accessed 2/27/2017)