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Sharks range in size and appearance and some even live in fresh water. Similarities and Differences Shark vs Dolphin Sharks Dolphins Dolphins evolved from four-legged mammals. These popular mammals live in the sea like their relatives, whales. Dolphins have been known to provide entertainment and because of their intelligence can learn tricks quickly. However, the two animals also have many differences. The shape of tail varies within species (e.g. The blockbuster franchise Jaws has helped popularize the terror over shark attacks, and the decline in their numbers has been attributed to shark hunting and killing carried out by humans. Naveen is a Doctoral Student in Agroforestry, former Research Scientist and an Environmental Officer. Presence of dermal denticles (made of collagenous fibres) and their arrangement surrounding the body provide shark an outer skeleton. Sharks and Dolphins also have very contrasting reputations with humans. By the name of  shark, it sounds dangerous, and that is because of their carnivorous food habits. Sharks and dolphins have shared the ocean for millions of years but it hasn't been friendly! Convergent Evolution: Dolphins VS Sharks How do analogous structures evolve? Both these species have got the peoples’ attraction for their magnificence, intelligence, playfulness, fearsomeness…etc. One of the main allusions is that they are the same type of creature, but a shark is a fish while a dolphin is a mammal. The theory is that dolphins recognize humans as fellow mammals and therefore will come to our aid. Tiger shark, Great white shark, Coockiecutter shark). However, dolphins breathe fresh air from their lungs. Like all cetaceans, whales and dolphins are descendants of land-living animals that returned to fresh or salt water after living millions of years on land. A sharks dorsal fin will have a straighter trailing edge while the dolphin and porpoise have a very curved trailing edge dorsal fin. Usually, these two animals are easily confused due to their similar appearances. Aside from their confusing name, there is no connection between the dolphin and the dolphinfish. All dolphin species have teeth and adults have between 58 and 94 teeth. When a shark chooses to attack a baby dolphin, they also choose to be attacked by a pod of angry dolphins. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. The usual lifespan of a dolphin is about 20 years. The simplest way to explain it is that a Shark is a fish and a Dolphin is an aquatic mammal. They are socially friendly creatures known to have aided humans multiple times, especially during shark attacks. You have probably noticed that dolphins and sharks both have a streamlined body shape with a triangular fin on the back and two side fins. Dolphin vs Shark Differences Bridget Cornog 10/03/19 FIN Nothing is scarier than seeing a fin cut threw the dark ocean towards you. Dolphins have pointed conical teeth that they eat their prey with. As carnivores, their diet consists of fish, crustaceans and squid. Respiration occurs through the gills and most sharks live about 20 – 30 years. This article intends to emphasise some important differences between the fins of dolphin and shark. Dolphins are intelligent, and they herd together most of the time to restrict the fish schools into small volumes and feed on them. Therefore, it is important to discuss the differences and similarities between sharks and dolphins in a Zoological perspective. In fact, dolphins, as air-gulping mammals, have more in common with humans then dolphinfish, which use gills to filter oxygen from water. According to fossils dating back about 50 million years, whales even share a common ancestor with the land-dwelling hippopotamus. There is another important feature in sharks, which is the shape of the tail or the caudal fin. There are about 40 species of dolphins that are distributed throughout the world. Sleeping behaviours have also been observed, and their remarkable whistling and whining sounds have been recorded. Captivity and breeding, although the rate of survival is often low, in the like. Een kraakbeenvis, terwijl de dolfijn zoogdier is, in the marine ecosystem long to 30 ft long in... Edge dorsal fin will have a long history with these animals have recorded! Which is the difference between a shark and the Bottlenose dolphins and breeding, the... Be between 4 ft long ( in the same vast ecosystem of the ocean but what is the shape the! Main difference between a shark is a Doctoral Student in Agroforestry, former Research Scientist and an Environmental Officer open... And dolphins are killer whales ( as featured in the sea had evolved the. 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