Thanks for answering my question about the crocodile.
Maybe you know it already, but in genesis chapter 1,21 (on the fifth day) appears the term התנינים הגדולים "Hataninim Hagdolim" which literally means "the great crocodiles". I think the KJV bible translates the term to "Dragons", and in fact there is a midrash that links those Taninim to the Pair of sea monsters "Leviathan nachash bariach" and "Leviathan akalton" mentioned in Isaiah 27,1. :
כ"ז, א: "בַּיּוֹם הַהוּא יִפְקֹד ה' בְּחַרְבּוֹ הַקָּשָׁה וְהַגְּדוֹלָה וְהַחֲזָקָה, עַל לִוְיָתָן נָחָשׁ בָּרִחַ, וְעַל לִוְיָתָן, נָחָשׁ עֲקַלָּתוֹן; וְהָרַג אֶת-הַתַּנִּין, אֲשֶׁר בַּיָּם".