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Aerial vision: unique adaptation in an intertidal fish.

J B Graham, R H Rosenblatt

    Science (New York, N.Y.)
    |May 1, 1970
    PubMed
    Summary

    The Mnierpes macrocephalus fish can live on land due to unique eye adaptations. Its flattened corneal surfaces correct for the myopia that affects fish eyes in air.

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    Area of Science:

    • Marine Biology
    • Comparative Physiology
    • Ophthalmology

    Background:

    • Mnierpes macrocephalus is a clinid fish species inhabiting rocky shores in the Eastern Tropical Pacific.
    • This species exhibits frequent terrestrial excursions, a behavior uncommon in fish.
    • Standard fish ocular anatomy results in myopia when in an air environment due to corneal curvature.

    Purpose of the Study:

    • To investigate the ocular adaptations of Mnierpes macrocephalus that facilitate terrestrial activity.
    • To understand how this fish overcomes the refractive challenges of vision in air.

    Main Methods:

    • Morphological examination of the Mnierpes macrocephalus eye.
    • Comparative analysis of corneal structure in aquatic versus terrestrial environments.

    Main Results:

    • Mnierpes macrocephalus possesses a unique ocular structure that enables clear vision in air.
    • The fish's cornea features two flattened surfaces, counteracting the typical myopic shift seen in air.

    Conclusions:

    • The specialized corneal morphology of Mnierpes macrocephalus is a key adaptation for its semi-terrestrial lifestyle.
    • This adaptation allows the fish to effectively navigate and forage in terrestrial environments.

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