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. 2019 Mar 29;10:644. doi: 10.3389/fmicb.2019.00644

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Copyright © 2019 Buckley, MacGregor and Teske.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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In situ close-up video still photo of an orange Beggiatoaceae mat in Guaymas Basin, taken by the bottom-facing Alvin camera a few centimeters above the seafloor during Alvin dive 4872 in the Cathedral Hill area of Guaymas Basin (27°N00.70/111°W24.25). The image shows the complex three-dimensional structure of a mat, arranged around several small hydrothermal outflow areas marked by white sulfur deposits, visible in the center of the image. The Individual orange filaments have approx. 40 μm diameter.