Its very likely that you are lacking a beauty star ✨ in one of your aquariums. When you are just a few beauty points shy of getting the last star, the stars bar in the aquarium selection window may appear to be full even though they aren't ⭐🌟⭐

Please visit all of your older aquariums and confirm if you have collected three beauty stars in all of these. Ensure that you check the stars in the aquariums themselves (by entering the aquarium), not in the aquarium selection window 🖼️

🔰PLEASE NOTE🔰
After recent game updates, the number of beauty points in some of your aquariums may have gone down slightly 🔻 That in turn could have influenced the number of beauty stars your aquariums have

If you're sure that you've collected all of the beauty stars, yet you still can't unlock a new aquarium, please contact our Customer Support team, and we'll do our best to help 💁🏻