What was the leviathan?

This article has been translated into the following languages:

Afrikaans العربية Bosanski Български 中文 中國話 Deutsch Español فارسی Français Ελληνικά हिन्दी Hrvatski Bahasa Indonesia Italiano Kiswahili 한국어 Magyar Polski Português Română Русский සිංහල Slovenčina Srpski Tagalog தமிழ் ไทย Українська اردو Tiếng Việt