Which main characteristic could be used to desperate shark 4 from 7?

Shark 4 can be distinguished from Shark 7 by its unique dorsal fin shape, which is taller and more triangular compared to the more rounded dorsal fin of Shark 7. Additionally, Shark 4 may exhibit different coloration or patterns on its skin, further aiding in identification. These morphological differences help in accurately differentiating between the two species.