Most algae need a hard substrate upon which to anchor with their holdfast. In silty mud bottoms they must compete for space on available shell debris with other organisms , as shown here by the red alga Graciliara blodgettii at 100 meters depth on McGrail Bank.
Photo Category: Ocean exploration
Photo Location: Gulf of Mexico
Photo Date: 2003
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| Added On | 16th October 2015 |
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