also: ナイルおおとかげ
Nile monitor; water leguaan
A large lizard species native to Africa; the name is a direct borrowing from English 'Nile monitor' combined with Japanese オオトカゲ (monitor lizard).
The Nile monitor is a large lizard that lives in Africa.
Kanji spelling with 大蜥蜴 for オオトカゲ; rarely used and may be unfamiliar to many readers.
Hiragana variant; less common than katakana but still a valid written form.
From English 'Nile monitor' + Japanese オオトカゲ (monitor lizard).