Small (~2m²) pond for wildlife

I'm planning on implementing a small pond to attract insect-eating wildlife (especially frogs and geckos) to my garden to reduce the population of mosquitoes and gnats. After planting my food forest I don't have too much space left, I'd dedicate at most 2m² for it.

My main questions are: is it even feasible to have such a small functional pond? How can I passively aerate the water (are there underwater plants that excel at it)? Also, I live in an area with incidence of dengue, so it's important to have some fish that eats the mosquito larvae. Which fish would live well in such a small environment, eat the larvae, but also eventually some plant matter (so I don't have to buy fodder in the winter)?

I'm sure I'll have more questions afterwards, but so far those are the most important. Thanks.

Do you have access to mosquito fish (Gambusia affinis) in Brasil? If not, perhaps tetras would work.

There is an informative webpage on mosquito fish here: http://www.lawestvector.org/mosquitofish.htm

It also has some good general information about ponds in it as well.

There is a youtube video, referenced in the Mosquito Control discussion last month, explaining the use of mosquito eating fish here: https://www.youtube.com/watch?v=3YHNl43DiVY

I had a Brazilian friend who told me that Curitiba was the best city in Brasil. That was over 30 years ago, is it still the best?