I see. "God did it". Are you familiar with the expression, deus ex machina?
You're telling me that juvenile dinosaurs swam almost 6K miles to arrive near the place Noah was building his Ark?
It's tough to have a critical examination of this story, or any story when questions about the physical impossibility of a certain element of that story is met with, "God did it".
The only documentation on the subject is from scripture. Human efforts to rationalize God out of it depend only upon human intellect that is fraught with presuppositions, and the resultant “evidence” that is tainted by that view. To immediately dismiss the concept of God in this case limits you, not him, or the accounts in scripture. You are putting yourself in a box, whether you realize it or not.