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![The hydrothermal systems at Giggenbach volcano are well within the photic zone expl1836.jpg The hydrothermal systems at Giggenbach volcano are well within the photic zone](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_expl1836.jpg?itok=2N5_CoPs)
Description
The hydrothermal systems at Giggenbach volcano are well within the photic zone.Schools of fish are seen here swimming among extinct hydrothermal chimneys.The microbial mat on the seabed indicates that there is still heat rising andthat chemosynthesis is occurring. (Image credit: New Zealand-American Submarine Ring of Fire 2005 Exploration; NOAA Vents Program)