Macroalgal Blooms A Caulerpa bloom in the Mediterranean Sea Pilayella deposited on a beach in Nahant, MA Expansive blooms of several Caulerpa spp. occurred off the Florida coast in 1997 and 2001 Native green seaweed Codium isthmocladum formed a bloom on deep reef communities in eastern Florida (B. LaPointe) Codium washed onto a beach in Florida (B. LaPointe)