This is two part question. First some background information. I am currently world building - hobby of mine - and I kind of hit a brick wall in terms of philosophy, ethics and planetary colonization. So the first question is based on a young Earth scenario. The planet in question would be analogous to Phanerozoic Earth, though the planet is inhabited with aquatic life, the land has not been "colonised" yet by life. So if a human were to inhabit a planet what would be the best way to do it? Do we just throw in typical Earth life or do we create creatures using the already pre-existing life as a toolkit. There is another question as well, this planet would have approximately have 88% of its surface covered in water. Would such a planet be even worth inhabiting?