"rock cod" meaning in English

{
  "forms": [
    {
      "form": "rock cods",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rock cod (plural rock cods)",
      "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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          "kind": "other",
          "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": "Gadiforms",
          "orig": "en:Gadiforms",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any of several Australian fishes of the genus Lotella"
      ],
      "id": "en-rock_cod-en-noun-Mamz9VWZ",
      "links": [
        [
          "Australian",
          "Australian"
        ],
        [
          "fish",
          "fish"
        ]
      ],
      "synonyms": [
        {
          "word": "rockcod"
        }
      ],
      "wikipedia": [
        "rock cod"
      ]
    }
  ],
  "word": "rock cod"
}

{
  "forms": [
    {
      "form": "rock cods",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rock cod (plural rock cods)",
      "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 (genus)",
        "en:Gadiforms"
      ],
      "glosses": [
        "Any of several Australian fishes of the genus Lotella"
      ],
      "links": [
        [
          "Australian",
          "Australian"
        ],
        [
          "fish",
          "fish"
        ]
      ],
      "wikipedia": [
        "rock cod"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "rockcod"
    }
  ],
  "word": "rock cod"
}