Pseudoscopelus altipinnis is a deep-sea fish known for its high dorsal fin and bioluminescent organs. It inhabits the mesopelagic zone, typically found at depths of 1,000 to 2,000 meters. Measuring around 6 inches and weighing up to 0.5 pounds, it preys on small fish and invertebrates, using its light-producing organs to attract prey in the dark ocean depths.
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