Here we have the Koruscians, an Aquatic/Avian species from my Chronicles.

Koruscians originally an aquatic species, developed webbed wings to help them traverse the few islands that made up the Koruscian Surface. Eventually they developed cities on these islands or built above their aquatic cities where they can simply thrust up and fly up above and land on. The species is best known for their shipbuilding which means they are able to build any kind of starship known to the galaxy as long as they get food and supplies due to how tedious it gets to build a starship.

The planet Korus is all ocean except for a few scattered islands, evidence showed that there used to be continents on Korus but sank beneath the sea during sometime before the Koruscians became sentient. Now the very few island that managed to survive are now home to cities that house interstellar species like Tretstonians, Novalians and Oakutaruians.