Maerl beds stud the ocean floor like underwater brambles. They’re pastel pink and, despite their knobbly appearance, made up of a red seaweed. This algae has a limestone skeleton which gives it a complex three-dimensional structure that is quite unlike the slimy seaweeds you may be more familiar with.
Click here for original story, One of Earth’s most biodiverse habitats lies off the Scottish coast – but climate change could wipe it out
Source: Phys.org