[bduerst]

Not quite, it's the opposite. We're having a hard enough time theoreticizing how self-replicating nucelotides with adequate lipid-bilayer maintaining molecular machinery occurred naturally on our volcanic, reducing-atmosphere of a planet.

Abiogenesis isn't the same as evolution, and given what limited knowledge we have of prebiotic Earth, life shouldn't have naturally occurred here. Ocean size doesn't matter in this case when the ocean isn't able to form a single self-replicating cell. The dice being rolled don't even have the number you need.