Argonaut octopus eggcase shell C019 / 1291
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Argonaut octopus eggcase shell C019 / 1291
Argonaut octopus eggcase shell. Egg case from a female greater argonaut (Argonauta argo) found in the Indo-Pacific. Argonauts are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin eggcase (seen here) that females secrete. This structure is not a true cephalopod shell, but an evolutionary innovation unique to the Argonaut genus. It is used as a brood chamber and for trapped surface air to maintain buoyancy. Argonauts are found in tropical and subtropical waters worldwide. This specimen measures 185mm long
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9301513
© GILLES MERMET/SCIENCE PHOTO LIBRARY
Cephalopod Cephalopods Indian Ocean Indo Pacific Mollusc Molluscs Mollusk Mollusks Pacific Shell Argonaut Argonauta Argo Cutouts Egg Case Eggcase Paper Nautilus
EDITORS COMMENTS
This print showcases the intricate beauty of an Argonaut octopus eggcase shell, known for its delicate and paper-thin structure. The image captures a close-up view of the egg case from a female greater argonaut, found in the Indo-Pacific region. These fascinating creatures, also referred to as paper nautiluses, possess a unique evolutionary adaptation that allows them to secrete this translucent chamber. The purpose of this remarkable shell is twofold: it serves as both a brood chamber for protecting their eggs and as a means to trap surface air, enabling buoyancy control. Although not considered a true cephalopod shell like those seen in other mollusks, this innovation is exclusive to the Argonaut genus. Argonauts are pelagic octopuses that inhabit tropical and subtropical waters across the globe. Measuring 185mm long, this particular specimen exemplifies the diversity and wonder found within marine biology. Against a striking black background, every detail of this natural marvel comes alive – showcasing its biological significance. With its cut-out presentation against darkness, Gilles Mermet's photograph highlights the solitary nature of this creature while emphasizing its structural elegance. This stunning image invites viewers into the mesmerizing world of these enigmatic animals thriving beneath oceanic depths in Asia's Indian Ocean and throughout Pacific waters.
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