Figure 2. In situ photographs of the two hydrothermally influenced sites.

(A–B) Fukai site, Higashi-Ensei; (A) Overview, (B) Close-up; the black arrowhead indicates Tristichotrochus ikukoae and the white arrowhead indicates Abyssotrophon cf. soyoae. (C–D) Crane site, Tarama Hill; (C) Overview, (D) Close-up; the white arrowhead indicates Abyssotrophon soyoae. The cut-out photographs are magnified images of gastropods seen at each site.