[Davidl919]

Thank you Shawn. I wasn't shooting for reproducing an ocean in my tank, actually I wouldn't even set an aquarium as a goal. A simple tank with little maintanence would be suffice for me .

But what I was attempting, was to get an idea of the natural order of the ocean and somewhat follow that cycle as far as introduction Or being that our tanks are infertile by means of insemination.

What I have found so far is the closest we can get to replicating (nowhere near as complex as the ocean) goes from the 1)bacteria level 2+3)algea 2+3) fauna 4)sponge 5) flatworm (Not aefw) 6) pod 7) invertebrate (crabs, shrimps) 8) fish
With a whole lot of stuff mising in between including evolution and I am in no way stating that this is the order I'm sure that i'm mistaken up there somewhere.

Yes reproduction in a tank is impossible/impractical from the cell level and even if possible no one lives over a million years to wait for it to occur naturally in a tank and you would still have to introduce somewhere in there.