A pouch or chamber in the belly region, particularly referring to the brood pouch found in certain amphibians and fish.
From Greek 'gaster' (belly) + 'theke' (case or pouch). This anatomical term was developed by naturalists studying species with specialized reproductive pouches.
Some frogs have a pouch like this where they carry tadpoles on their backs—it's one of nature's most unusual babysitting systems, and it's named using this exact term by herpetologists!
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