Maranta (Prayer Plant)
Why doesn't my 'Prayer Plant' close at night?
Some species of maranta don't fold leaves as others. My observation is that the "fishbone" doesn't pray like "rabbit tracks". Also, does the plant get artificial light at night? This may keep your plant from praying. This link has good information on care of prayer plants: https://www.gardeningknowhow.com/houseplants/prayer-plant/maranta-prayer-plant-peacock-plant.htm