"sand flounder" meaning in English

{
  "forms": [
    {
      "form": "sand flounders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sand flounder (plural sand flounders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Flatfish",
          "orig": "en:Flatfish",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "alt": "Rhombosolea plebeia",
          "word": "New Zealand sand flounder"
        }
      ],
      "glosses": [
        "Any of the family Paralichthyidae of flounders."
      ],
      "id": "en-sand_flounder-en-noun-VsXACWTN"
    }
  ],
  "word": "sand flounder"
}

{
  "derived": [
    {
      "alt": "Rhombosolea plebeia",
      "word": "New Zealand sand flounder"
    }
  ],
  "forms": [
    {
      "form": "sand flounders",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sand flounder (plural sand flounders)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "Entries using missing taxonomic name (family)",
        "en:Flatfish"
      ],
      "glosses": [
        "Any of the family Paralichthyidae of flounders."
      ]
    }
  ],
  "word": "sand flounder"
}