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Castle vent, in the International District field on the eastern edge of the caldera of Axial Seamount, is covered with thousands of strands of filamentous bacteria.
Music: Gymnopedie No. 1 by Erik Satie, provided royalty-free by Kevin MacLeod, www.incompetech.com.
Credit: Created by Giora Proskurowski, UW, from footage taken during the ENLIGHTEN '10 expedition.