"Sirena Deep" meaning in English

{
  "etymology_text": "From being chosen in a competition held among students in the Marianas to name the deep by the discovery team. From association with mythological sirens of the deep.",
  "head_templates": [
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      "args": {},
      "expansion": "Sirena Deep",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
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      "categories": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Oceanography",
          "orig": "en:Oceanography",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
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          "kind": "place",
          "langcode": "en",
          "name": "Places",
          "orig": "en:Places",
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            "Proper nouns",
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            "Fundamental",
            "Nouns",
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          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "Challenger Deep"
        },
        {
          "word": "Horizon Deep"
        }
      ],
      "glosses": [
        "A deep in Mariana Trench, Pacific Ocean; the third deepest known place on Earth, second deepest in the Mariana Trench."
      ],
      "id": "en-Sirena_Deep-en-name-PGSSVgzL",
      "links": [
        [
          "Mariana Trench",
          "Mariana Trench#English"
        ],
        [
          "Pacific Ocean",
          "Pacific Ocean#English"
        ]
      ],
      "synonyms": [
        {
          "english": "former name",
          "word": "HMRG Deep"
        }
      ],
      "wikipedia": [
        "en:Sirena Deep"
      ]
    }
  ],
  "word": "Sirena Deep"
}

{
  "coordinate_terms": [
    {
      "word": "Challenger Deep"
    },
    {
      "word": "Horizon Deep"
    }
  ],
  "etymology_text": "From being chosen in a competition held among students in the Marianas to name the deep by the discovery team. From association with mythological sirens of the deep.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Sirena Deep",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
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        "en:Oceanography",
        "en:Places"
      ],
      "glosses": [
        "A deep in Mariana Trench, Pacific Ocean; the third deepest known place on Earth, second deepest in the Mariana Trench."
      ],
      "links": [
        [
          "Mariana Trench",
          "Mariana Trench#English"
        ],
        [
          "Pacific Ocean",
          "Pacific Ocean#English"
        ]
      ],
      "wikipedia": [
        "en:Sirena Deep"
      ]
    }
  ],
  "synonyms": [
    {
      "english": "former name",
      "word": "HMRG Deep"
    }
  ],
  "word": "Sirena Deep"
}