Whales are generally considered more developed than sharks based on several features.

First, whales are mammals, which means they are warm-blooded, have lungs for breathing air, and nurse their young with milk. This allows them to maintain a stable body temperature and care for their young more effectively than sharks, which are cold-blooded and rely on external temperatures.

Additionally, whales have complex social behaviors, advanced communication skills, and larger brains relative to their body size compared to sharks. They also exhibit a range of adaptations for living in diverse environments, such as echolocation in some species for navigation and hunting. While both sharks and whales are well adapted to their aquatic habitats, the advanced traits of whales indicate a higher level of development in terms of physiology and behavior.