It is an interesting idea to use an animal to counter climate change. Are there any organisms that are carbon negative or cause a net decrease in some energy b

It is an interesting idea to use an animal to counter climate change. Are there any organisms that are carbon negative or cause a net decrease in some energy balance? I imagine some sort of bird with white/reflective feathers that would shade the east a bit. Maybe we could alter an algea so that instead of getting red/green color blooms there would be a white/reflective bloom so large portions of the ocean would reflect light instead.