Distribution

The distribution of Magelona johnstoni was in both periods limited to the near-coastal zone, where the species was characterised by a rather uniform distribution and a high relative occurrence. Whereas M. johnstoni was found in maximum densities of about 200 ind./m2 in the 1976-1984 period, higher densities were found in the 1994-2001 period (up to approximately 9,000 ind./m2)