The naval terms "ton" and "tonnage" refer to capacity and not to weight. A vessel of 3 million cubic feet (you're retailin' stretchers here, by the way), would be a vessel of only 30,000 tons. The ore ship
Edmund Fitzgerald, celebrated in song by Gordon Lightfoot, was a vessel of 80,000 tons--which is to say, it had a capacity of 8 million cubic feet. A vessel of
that size could not begin to hold all of the species known on earth now, along with all species currently identified as having once existed and now extinct,
in addition to the necessary fodder to keep them alive. I wasn't even going to embarrass you with the entire topic of caging them and stowing the cages.
While we're at it, do you care to explain how all of these critters were rounded up and stowed, and how all of the necessary fodder was garnered and stowed? All in forty days remember, and during heavy rains. (Don't try to claim they weren't heavy rains, because then we'll be obliged to revisit your contention about how high the waters rose.)
You have some real problems, though, with the construction of wooden ships. The
United States Ship Constitution, a frigate first put into service with the United States Navy in 1798, now rests in Boston as a national treasure (
The United States Navy's site for Constitution). This frigate is 204 feet in length, is just over 43 feet at the beam, and draws almost 23 feet at the stern--considerably smaller than the laughably absurd vessel you are contending for (
The Constitution Museum, source for the dimensions).
Now one of the genius aspects of American frigates built in the 1790s and thereafter were the provisions to prevent hogging. Hogging is a liability of all wooden ships. Even small coastal vessels which plied relatively calm intercoastal waters were subject to hogging, which created serious dangers in foul weather--can you imagine fouler weather than that which results in a planet-wide cataclysmic flood?
Constitution and all the wooden ships commissioned by Congress, though, had taken a positive step to reduce hogging to a manageable problem. Hogging occurs because the vessel bows up in the middle, a natural consequence of weighing so much from the many tons of wood used to build the vessel. Referring to the first named source,
Constitution was built with the timber of nearly 2000 trees. That suggests far more trees would be needed to create a wooden behemoth on the scale you claim. How many sons did you say old Noah had? I mean, forty days and nights, and all those critters to round up in the driving rain, and all that fodder to get to a dry place before it rots in the driving rain--and on top of that, literally thousands of trees to be felled, and planed with hand adzes, and joined with the hand tools which constituted the technology of the day--are you sure this ain't another one of your stretchers?
Constitution and all such frigates and line-of-battle-ships built for the United States Navy in the era of wooden ships solved the hogging problem by the use of transverse supports built into and across the strakes (the upright, solid oak beams to which the outer planks are attached) at angles to the centerline described by the keel and keelson. Built with the 26" oak which was standard in
Constitution and all such ships (and which produced beams much thicker than 26" inches--they were combined to form larger structures), these support structures greatly reduced the carrying capacity of the hull. That's not a problem with a warship, which is not designed to carry cargo--it just needs to carry food for the crew and powder and shot, which is a trifling requirement--crew quarters by far accounted for the most of hull space.
To get back to hogging, such structures were not used in cargo ships, because of the drastic reduction of cargo capacity. This means that in heavy weather, they could "start" their hulls (meaning the planks attached to the strakes separate, and the vessel begins to ship water in a truly alarming fashion) due to hogging. For that reason, cargo vessels routinely foundered in storms. Even when they survived, it was usually because they ran for port, or,
in extremis, intentionally beached the vessel on a lee shore, in order to save the cargo, and the ship be damned. Cargo vessels usually did not last even as much as ten years in constant service, and although problems such as the toredo were significant, hogging was the single most important cause of wooden vessels becoming unsound and unsafe.
Now certainly your "ark" did not need to last ten years. But it did need to survive the truly horrendous storms which would be necessary to account for the rise in sea level the bobble thumpers commonly refer to. There would be no port to run to, and no lee shore on which to ground, if hogging caused the hull to start. With a vessel which was anywhere from two to three times the length and as much larger at the beam,
but which was nowhere near as deep at the keelson as the wooden vessels of the United States Navy, hogging would be a problem which assumed monunmental proportions, and precisely because it obviously did not draw nearly as much water proportional to its length and beam as a wooden warship of the United States Navy in that era. So if they had taken no provisions for hogging, they'd never have swum long enough (ships ares said to "swim" in cases in which they do not founder) to survive--or if they had provided against hogging, then they'd have drastically reduced the cargo capacity. Do you need to trot out another divine miracle at this point? I'll avert my eyes so as not to embarrass you.
Yes, that's why these things can get so embarrassing for the bobble thumpers. Not only do they
not know jack sh!t about biology, and consistently show it--they don't know squat about naval architecture in wood vessels,
and they show that, too ! ! !