Peackock's Tail Scroll Algae Padina Pavonica Swaying In Current On Reef - 4K 影片檔

A frond of scroll algae, Padina pavonica, sways in the tidal current on a reef in the Andaman Sea, its fan shaped blade rolled into a tight spiral anchored to coral rubble by a small holdfast. The movement shows how this brown reef algae stays fixed to hard substrate while flexing with passing current, a trait shared by many calcified reef algae. Pale scroll bands across the blade mark where calcium carbonate has built up within the tissue. 4K, wide angle, horizontal medium shot, scuba diver POV. Andaman Sea, Krabi Province, Thailand.