"pez plano" meaning in Spanish

{
  "forms": [
    {
      "form": "peces planos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "pez plano m (plural peces planos)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "es",
          "name": "Fish",
          "orig": "es:Fish",
          "parents": [
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "flatfish"
      ],
      "hyponyms": [
        {
          "word": "fletán"
        },
        {
          "word": "gallo del norte"
        },
        {
          "word": "lenguadina"
        },
        {
          "word": "lenguado"
        },
        {
          "word": "limanda"
        },
        {
          "word": "platija"
        },
        {
          "word": "rémol"
        },
        {
          "word": "rodaballo"
        },
        {
          "word": "solla"
        }
      ],
      "id": "en-pez_plano-es-noun-qNHt9wzu",
      "links": [
        [
          "flatfish",
          "flatfish"
        ]
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "es:pez plano"
      ]
    }
  ],
  "word": "pez plano"
}

{
  "forms": [
    {
      "form": "peces planos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "pez plano m (plural peces planos)",
      "name": "es-noun"
    }
  ],
  "hyponyms": [
    {
      "word": "fletán"
    },
    {
      "word": "gallo del norte"
    },
    {
      "word": "lenguadina"
    },
    {
      "word": "lenguado"
    },
    {
      "word": "limanda"
    },
    {
      "word": "platija"
    },
    {
      "word": "rémol"
    },
    {
      "word": "rodaballo"
    },
    {
      "word": "solla"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish multiword terms",
        "Spanish nouns",
        "es:Fish"
      ],
      "glosses": [
        "flatfish"
      ],
      "links": [
        [
          "flatfish",
          "flatfish"
        ]
      ],
      "tags": [
        "masculine"
      ],
      "wikipedia": [
        "es:pez plano"
      ]
    }
  ],
  "word": "pez plano"
}