Now we are back into older lava (on the far side of the new lava flow). There does not appear to be a hydrothermal vent nearby. Instead, you see a variety of sponges, soft corals, brittle stars, and fish. The sessile animals indicate that the lava at this site has been colonized for many years and is old.

-> Old lava, uncollapsed, no hydrothermal vent

-> Old, established non-vent biological community