"sea butterfly" meaning in English

{
  "forms": [
    {
      "form": "sea butterflies",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sea butterfly (plural sea butterflies)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
        },
        {
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          "name": "Terms with Navajo translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Gastropods",
          "orig": "en:Gastropods",
          "parents": [
            "Mollusks",
            "Animals",
            "Lifeforms",
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            "Life",
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        }
      ],
      "examples": [
        {
          "ref": "2012, Caspar Henderson, The Book of Barely Imagined Beings, Granta Books, published 2013, page 284:",
          "text": "Sea butterflies are pteropods: sea snails that swim by flapping pad-like ‘feet’ which have grown into wings.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A small pelagic sea snail of the suborder Thecosomata."
      ],
      "id": "en-sea_butterfly-en-noun-AdOKOs3F",
      "links": [
        [
          "sea snail",
          "sea snail"
        ]
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "Thecosomata",
          "tags": [
            "masculine"
          ],
          "word": "Seeschmetterling"
        },
        {
          "code": "is",
          "lang": "Icelandic",
          "sense": "Thecosomata",
          "tags": [
            "masculine"
          ],
          "word": "vængjasnigill"
        },
        {
          "code": "nv",
          "lang": "Navajo",
          "sense": "Thecosomata",
          "word": "tąądee naʼałkǫ́ʼii"
        }
      ],
      "wikipedia": [
        "sea butterfly"
      ]
    }
  ],
  "word": "sea butterfly"
}

{
  "forms": [
    {
      "form": "sea butterflies",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "sea butterfly (plural sea butterflies)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "2012, Caspar Henderson, The Book of Barely Imagined Beings, Granta Books, published 2013, page 284:",
          "text": "Sea butterflies are pteropods: sea snails that swim by flapping pad-like ‘feet’ which have grown into wings.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A small pelagic sea snail of the suborder Thecosomata."
      ],
      "links": [
        [
          "sea snail",
          "sea snail"
        ]
      ],
      "wikipedia": [
        "sea butterfly"
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "Thecosomata",
      "tags": [
        "masculine"
      ],
      "word": "Seeschmetterling"
    },
    {
      "code": "is",
      "lang": "Icelandic",
      "sense": "Thecosomata",
      "tags": [
        "masculine"
      ],
      "word": "vængjasnigill"
    },
    {
      "code": "nv",
      "lang": "Navajo",
      "sense": "Thecosomata",
      "word": "tąądee naʼałkǫ́ʼii"
    }
  ],
  "word": "sea butterfly"
}