What is the ruling of Islamic Sharia on shaping shells and marine extracts into the form of birds and fish, without drawing the eyes, beak, or legs?

The manufacturing and trading of artifacts in the shape of animals and birds are forbidden, especially if they are three-dimensional and cast a shadow. The prohibition is more severe when depicting animate beings. Some scholars have permitted their depiction if they are imperfectly formed, lacking a part essential for their survival. However, the more pious approach is to avoid them altogether to steer clear of controversy.