I like cats and for my world I wanted domestic cats (with changes obviously) but on a different planet. But I am a complete moron to space and don't know how animals would react to constant twilight.
The basis for my species, called Seekers, are very catlike because millions of years ago some humans injected cat DNA into the native wildlife making the species after some trial and error of course. The species are feral and tends to be in groups from family to utterly random Seekers. They vary in color but white ones are very rare due to selection along with tortoiseshells and calicos. (The species is still development this is why I ask this.)
The planet does orbit but its parent star is very young and is a good enough distance to get some light to have life but not as much as our own planet so its in a twilight stage. The photosynthesis changed a lot. Also since there are no alien people or people really there are no buildings. Instead of taking in sunlight the plants takes the light from the animals for all animals markings glow in the dark the brighter the glow the stronger so the dimmer shows old age, sickness, young they also take in a lot more water and the other components to make up for the lack of light. The terrain is varied but the plants tends to be darker and there are more dense meadow lands than forests except one rainforest where the dark plants thrive. Also there are two moons one being a meteor caught into the orbit of the planet.