50.5 MB (50.0 MB compressed)
3638 x 4850 pixels
30.7 x 41.1 cm ⏐ 12.1 x 16.2 in (300dpi)
DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Bladder wrack (Fucus vesiculosus) seaweed on the shore. The characteristic air bladders (round) act as floats when the plant is underwater. This seaweed is a good source of iodine and was used in the nineteenth century to treat goitre, a swelling of the thyroid gland caused by iodine deficiency. Bladder wrack is a common food in Japan and is used as a flavouring throughout Europe. It grows on rocky shores around the middle of the littoral zone.
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