It helps them swim.
the tail fins of a bottlenose dolphin are called flukes
dolphin have fins to steer in the ocean
Analogous!
Fins have a stabilizing role; they help a dolphin to swim in a straight line.
The dorsal fin of a dolphin is usefu,l because it can control the balance when a dolphin is swimming.It can also be useful for signs of dolphins and not sharks because the dorsal fin of a dolphin and a shark is slightly different.
Starfish is a subspecies of dolphin. They also have more teeth and fewer fins.
Shark dorsal fins are typically straight and rigid, while dolphin dorsal fins are curved or falcate. This difference in dorsal fin shape is one of the visual cues you can use to differentiate between sharks and dolphins in the wild.
Turtles are water-dwelling reptiles, so they have webbed feet but they do not have fins like a fish or dolphin.
Sharks have straight dorsal fins, dolphins have curved dorsal fins and whales don't have dorsal fins :)
The ethical debate surrounding the harvesting of shark fins and dolphin fins can be compared in an analogous manner because both involve the controversial practice of killing marine animals for their fins, which can lead to negative impacts on the populations of these species and their ecosystems.
dolphin
Its front fins are used to steer the dolphin through the water. The dorsel fin helps so the dolphin does not roll while swimming.