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  "path": "/science/oceanography/japanese-eels-two-sperm-types/",
  "publishedAt": "2026-05-20T14:44:37.000Z",
  "site": "https://www.zmescience.com",
  "tags": [
    "Animals",
    "News",
    "Oceanography",
    "Anguilla japonica",
    "aquaculture",
    "endangered species",
    "fish farming",
    "Japanese eel",
    "marine biology",
    "microscopy",
    "sperm heteromorphism",
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  ],
  "textContent": "Growing eels might not be as simple as we thought.",
  "title": "Stunned Japanese Scientists Find That Eels Have Two Types of Sperm, and They’re Not Sure Why"
}