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Photorealistic underwater scene with deep violet and iridescent dark blue marine plants on rocky terrain, illuminated by sunlight from above.

Photorealistic underwater scene with deep violet and iridescent dark blue marine plants on rocky terrain, illuminated by sunlight from above.

Cyanophyta Profunda would primarily use novel pigments optimized for blue light absorption, likely appearing **deep violet, black, or even an iridescent dark blue**. Their structures would be simple, filamentous or sheet-like mats initially, gradually forming more complex, branching thalli or encrusting structures on submerged rocks. See more