"nurse shark" meaning in English

{
  "forms": [
    {
      "form": "nurse shark",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "nurse sharks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "A nurse shark is a type of shark of the family Ginglymostomatidae that have two fleshy barbels hanging from the lower jaw."
      ],
      "id": "simple-nurse_shark-en-noun-BDcOcfUz",
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "word": "nurse shark"
}

{
  "forms": [
    {
      "form": "nurse shark",
      "tags": [
        "singular"
      ]
    },
    {
      "form": "nurse sharks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "expansion": "[POS TABLE]",
      "name": "noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Countable nouns"
      ],
      "glosses": [
        "A nurse shark is a type of shark of the family Ginglymostomatidae that have two fleshy barbels hanging from the lower jaw."
      ],
      "raw_tags": [
        "countable"
      ]
    }
  ],
  "word": "nurse shark"
}