Greenland Sharks Can Survive With Severely Damaged Vision

This near-blind giant still hunts successfully in darkness.

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The parasite Ommatokoita elongata attaches directly to the cornea and feeds on eye tissue.

Even when parasitic copepods impair their corneas, Greenland sharks continue to locate prey using highly developed olfactory senses suited for pitch-black Arctic waters.

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💥 Impact (click to read)

In an environment where sunlight barely penetrates for months, vision becomes secondary, allowing partially blind predators to remain ecologically dominant.

Their reliance on non-visual sensory systems highlights how deep sea evolution favors chemical and pressure detection over eyesight at extreme latitudes.

Source

Journal of Parasitology

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