"zone photique" meaning in French

{
  "forms": [
    {
      "form": "zones photiques",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "zone photique f (plural zones photiques)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Ecology",
          "orig": "fr:Ecology",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "photic zone, volume of a body water where sunlight is useable by living organisms"
      ],
      "id": "en-zone_photique-fr-noun-6qjeFaXt",
      "links": [
        [
          "ecology",
          "ecology"
        ],
        [
          "photic zone",
          "photic zone"
        ]
      ],
      "raw_glosses": [
        "(ecology) photic zone, volume of a body water where sunlight is useable by living organisms"
      ],
      "related": [
        {
          "word": "photosynthèse"
        }
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "biology",
        "ecology",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/zɔn fɔ.tik/"
    }
  ],
  "word": "zone photique"
}

{
  "forms": [
    {
      "form": "zones photiques",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "zone photique f (plural zones photiques)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "photosynthèse"
    }
  ],
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "French nouns with red links in their headword lines",
        "French terms with IPA pronunciation",
        "fr:Ecology"
      ],
      "glosses": [
        "photic zone, volume of a body water where sunlight is useable by living organisms"
      ],
      "links": [
        [
          "ecology",
          "ecology"
        ],
        [
          "photic zone",
          "photic zone"
        ]
      ],
      "raw_glosses": [
        "(ecology) photic zone, volume of a body water where sunlight is useable by living organisms"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "biology",
        "ecology",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/zɔn fɔ.tik/"
    }
  ],
  "word": "zone photique"
}