"barrel jellyfish" meaning in English

{
  "forms": [
    {
      "form": "barrel jellyfishes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "barrel jellyfish (plural barrel jellyfishes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Dutch translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "True jellyfish",
          "orig": "en:True jellyfish",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Rhizostoma pulmo, a species of mildly venomous jellyfish that looks similar to a mushroom."
      ],
      "id": "en-barrel_jellyfish-en-noun-aCbO6i~o",
      "links": [
        [
          "venomous",
          "venomous"
        ],
        [
          "jellyfish",
          "jellyfish"
        ],
        [
          "mushroom",
          "mushroom"
        ]
      ],
      "synonyms": [
        {
          "word": "dustbin-lid jellyfish"
        },
        {
          "word": "frilly-mouthed jellyfish"
        }
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "lang_code": "nl",
          "sense": "Rhizostoma pulmo",
          "tags": [
            "feminine"
          ],
          "word": "bloemkoolkwal"
        }
      ]
    }
  ],
  "word": "barrel jellyfish"
}

{
  "forms": [
    {
      "form": "barrel jellyfishes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "barrel jellyfish (plural barrel jellyfishes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries using missing taxonomic name (species)",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Dutch translations",
        "en:True jellyfish"
      ],
      "glosses": [
        "Rhizostoma pulmo, a species of mildly venomous jellyfish that looks similar to a mushroom."
      ],
      "links": [
        [
          "venomous",
          "venomous"
        ],
        [
          "jellyfish",
          "jellyfish"
        ],
        [
          "mushroom",
          "mushroom"
        ]
      ],
      "synonyms": [
        {
          "word": "dustbin-lid jellyfish"
        },
        {
          "word": "frilly-mouthed jellyfish"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "lang_code": "nl",
      "sense": "Rhizostoma pulmo",
      "tags": [
        "feminine"
      ],
      "word": "bloemkoolkwal"
    }
  ],
  "word": "barrel jellyfish"
}