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This is a single-celled organism called Loxodes, and it is about to die. Loxodes have pigment granules that give them a yellowish-brown coloration, but they also make the organisms sensitive to light—though only when there is a high level of oxygen in the water. When light hits these pigment granules, it excites the pigment chemically and triggers a chain reaction that disassembles the entire cell membrane, almost like pulling a loose thread from a sweater. . Loxodes clings to life, its biologic