I don't have a certain answer to this. But I believe that it is POSSIBLE that the flood was only regional in scope, and that it merely covered the then-known geographic stretch of mankind at and up to that time, but not necessarily the entire earth. If this is true, then species of animals not in the flood zone MIGHT have survived. However, the text makes that highly uncertain: "And God saw the earth, and behold, it was corrupt, for ALL flesh had corrupted their way on the earth. And God said to Noah, "I have determined to make an end of ALL flesh,..."So, your interpretation of this, is that the Noahic flood killed all animals on the entire face of the planet?
At the very least, the extent of God's judgment appears to have been universal to ALL men, as the all-inclusives and the geographic reach of mankind, up to that time, was limited. But as to whether it globally included all other species, I can't say for sure. But, for the record, I believe in old-earth creationism (13.73 billion years old universe, about 4.5 billion years old earth).
