noctiluca scintillans algae cells algae under microscopic view, bioluminescent, bright blue glow on water at night, responsible fo

abyss algae aquatic bioluminescent blue bright cells cnidaria environment environmental europe eutrophication exotic fish giving glow glowing hazards life luminous marine mauve mediterranean microscopic nature night noctiluca ocean oceanographic oceanography organism pelagia pelagiidae pink poison poisonous purple red responsible salt scintillans scuba sea seen snorkeling sparkle stinger submarine tentacle tides toxic tropical undersea underwater venomous view water wild wildlife