Soft Corals In Murky Harbour

Many people think corals live only in tropical seas. As far as I know they live in all seas. Tropical seas are famous for reef-building hard corals. In temperate and cold seas one can find very delicate soft corals in unusually vivid colours. Like the ones in the pictures. Sometimes they can be found in the murky waters of silty harbours. They grow on anything hard … a piece of rock, a submerged tree, a horse mussel shell. I wonder what they need to survive. Perhaps just a bit of current to bring nutrients to the hungry polyps.