Maerl Bed Snorkelling — Falmouth Bay

The sheltered bays of the Fal estuary and Falmouth Bay in Cornwall contain Europe's largest known living maerl beds — deep-pink calcified seaweed that grows in branched coral-like formations across the seafloor creating the most visually extraordinary shallow marine habitat in British waters, a living pink carpet of extraordinary texture and colour visible to snorkellers in just three to five metres of remarkably clear Cornish water. Maerl grows at only one millimetre per year, making the largest beds centuries old and the habitat among the most slowly accumulating marine ecosystems in the world, and the Fal's beds support populations of juvenile fish, sea urchins, stalked jellyfish, and the rare sunset cup coral in densities found in no other British marine environment. Snorkelling above the Fal maerl beds on a calm summer day — the pink branching seaweed extending to the limit of visibility in every direction below, the water filtered green-gold by the estuary — is a uniquely British marine experience of ethereal underwater beauty. Guided snorkelling tours from Falmouth operate specifically to the maerl sites in summer, and kayak trips from Mylor Harbour cross the bed locations where the pink colouration is visible through the hull in clear conditions. The wider Fal estuary adds Atlantic grey seals, little egrets, and wintering divers to a single visit.