Well God created sea animals and flying creatures on day 5 cattle, and man and beast along with creeping things on day 6... If you believe God's Word you have to believe this means dinosaurs as well. If God could call any animal to the ark then He definitely could call baby dino too.
Might be revering to a Brachiosaurus or one of the other big ones which had a tail as big as a cedar.
If you beleive genesis...age of the earth was only a few thousand years old in those days.
Might have been a dinosaur...revered to as dragon in those days in the bible.