Whilst we would like images
like this, as ShaktiGurl has said, we do not have anything approaching this resolution. Nothing better exists, and even if we could arrange the satellites to be tasked to take better resolution, (which would take some time and in any case couldn't be guaranteed to be free from cloud cover) we would have to be multi-millionaires, or better, to be able to afford it. It would be cheaper to air-search the entire ocean, and that is way way beyond available finances (again, we would need to be multi-millionaires).
The resolution of images
that we have, and are likely to have, will at best be sufficient to show Nina as a slightly lighter pixel against a dark ocean. And seeing that will require a lot of people looking at data. It is likely to produce a lot of 'false-positives' which would then somehow need to be evaluated.