How long can a ray live? How long does it usually last?

Rays, also known as devil fish, are oblate or rhombic. It is like a butterfly in the water, with its body stretched, beautiful and elegant. The lifetime of rays is generally between 25 and 30 years. Of course, its life span is closely related to the living environment and feeding methods. Rays are very similar to sharks in Mesozoic and Jurassic, so they are closely related. The rays have scaleless cartilage, developed pectoral fins, whiplike tail and thorns, and have the habit of hiding in the seabed sand. Rays are shaped like flying butterfly wings, and their pectoral fins swim in waves, just like flying in water, which is very leisurely and beautiful. Although rays and sharks are related, the difference between them is very big. Rays mainly feed on small invertebrates or filter-feeding zooplankton, and their teeth are paved with stones, unlike the terrible triangular fangs of sharks. To put it simply, under the premise of artificial feeding, ensuring the stability of water quality and environment, scientific feeding and disease prevention, the life span of ray is generally not less than 20 years. Raccoon fish has a peculiar shape, so it has high ornamental value. However, in the breeding process of rays, there are also cases in which males bite females. Male fish often bite the female fish black and blue, which makes her physically and mentally frustrated and greatly reduces her ornamental value. It is very important for breeders to keep learning relevant feeding skills and sum up their feeding experience if they want the rays to grow healthily.