The main difference between the shark and dolphin is that shark is a cartilaginous fish while dolphin is a mammal.
Shark
Any of numerous cartilaginous fishes of the subclass Elasmobranchii that are chiefly carnivorous and marine. Sharks have a streamlined torpedolike body, five to seven gill openings on each side of the head, a large oil-filled liver, and tough skin covered with small toothlike scales.
Dolphin
Any of various marine toothed whales of the family Delphinidae, having a beaklike snout, a curved dorsal fin, and a slender streamlined body.
Shark
(Informal)A person, such as a loan shark, who takes advantage of the misfortune of others for personal gain.
Dolphin
Any of several toothed whales inhabiting rivers and estuaries in South America and South Asia, having a long narrow beak, broad flippers, a flexible neck, and usually a reduced dorsal fin. A species native to the Yangtze River is thought to be extinct. Also called river dolphin.
Shark
(Informal)A person unusually skilled in a particular activity
A card shark.
Shark
To obtain by deceitful or underhand means.
Dolphin
See pompano dolphinfish.
Shark
To take advantage of others for personal gain, especially by fraud and trickery.
Dolphin
A buoy, pile, or group of piles used for mooring boats.
Shark
(ichthyology) A scaleless, predatory fish of the superorder Selachimorpha, with a cartilaginous skeleton and 5 to 7 gill slits on each side of its head.
Dolphin
A group of piles used as a fender, as at a dock or around a bridge pier.
Shark
The noctuid moth Cucullia umbratica.
Dolphin
A carnivorous aquatic mammal in one of several families of order Cetacea, famed for its intelligence and occasional willingness to approach humans.
Shark
A university student who is not a fresher that has engaged in sexual activity with a fresher; usually habitually and with multiple people.
Dolphin
Tursiops truncatus, (Atlantic bottlenose dolphin) the most well-known species.
Shark
Someone who exploits others, for example by trickery, lies, usury, extortion.
Dolphin
A fish, the mahi-mahi or dorado, Coryphaena hippurus, with a dorsal fin that runs the length of the body, also known for iridescent coloration.
Shark
A sleazy and amoral lawyer.
Dolphin
(heraldry) A depiction of a fish, with a broad indented fin, usually embowed.
Shark
An ambulance chaser.
Dolphin
The dauphin, eldest son of the kings of France.
Shark
(informal) A relentless and resolute person or group, especially in business.
Dolphin
(history) A mass of iron or lead hung from the yardarm, in readiness to be dropped through the deck and the hull of an enemy's vessel to sink it.
Shark
(informal) A very good poker or pool player. Compare fish (a bad poker player).
Dolphin
(nautical) A kind of wreath or strap of plaited cordage.
Shark
A person who feigns ineptitude to win money from others.
Dolphin
(nautical) A spar or buoy held by an anchor and furnished with a ring to which ships may fasten their cables.
Shark
(rare) To fish for sharks.
Dolphin
(nautical) A mooring post on a wharf or beach.
Shark
Of a university student who is not a fresher, to engage in sexual activity with a fresher, or to be at a bar or club with the general intention of engaging in such activity.
Dolphin
(nautical) A permanent fender designed to protect a heavy boat or coastal structure from the impact of large floating objects such as ice or floating logs.
Shark
(obsolete) To steal or obtain through fraud.
Dolphin
One of the handles above the trunnions by which a gun was lifted.
Shark
To play the petty thief; to practice fraud or trickery; to swindle.
Dolphin
(nautical) A man-made semi submerged maritime structure, usually installed to provide a fixed structure for temporary mooring, to prevent ships from drifting to shallow water or to serve as base for navigational aids.
Shark
To live by shifts and stratagems.
Dolphin
A cetacean of the genus Delphinus and allied genera (esp. Delphinus delphis); the true dolphin.
Shark
(obsolete) To pick or gather indiscriminately or covertly.
Dolphin
The Coryphæna hippuris, a fish of about five feet in length, celebrated for its surprising changes of color when dying. It is the fish commonly known as the dolphin. The term is also applied to the related Coryphaena equisetis. Called also dolphinfish and (especially in Hawaii) mahimahi. See also dolphinfish and Coryphænoid.
Shark
Any one of numerous species of elasmobranch fishes of the order Plagiostomi, found in all seas.
Dolphin
A mass of iron or lead hung from the yardarm, in readiness to be dropped on the deck of an enemy's vessel.
Shark
A rapacious, artful person; a sharper.
Dolphin
A kind of wreath or strap of plaited cordage.
Shark
Trickery; fraud; petty rapine; as, to live upon the shark.
Dolphin
In old ordnance, one of the handles above the trunnions by which a cannon was lifted.
Shark
To pick or gather indiscriminately or covertly.
Dolphin
Large slender food and game fish widely distributed in warm seas (especially around Hawaii)
Shark
To play the petty thief; to practice fraud or trickery; to swindle.
Neither sharks for a cup or a reckoning.
Dolphin
Any of various small toothed whales with a beaklike snout; larger than porpoises
Shark
To live by shifts and stratagems.
Shark
Any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales
Shark
A person who is ruthless and greedy and dishonest
Shark
A person who is unusually skilled in certain ways;
A card shark
Shark
Play the shark; act with trickery
Skeleton of sharks is made of cartilage while the skeleton of dolphin is made of bones. Therefore, sharks are known as the cartilaginous fish, whereas the dolphin is known as a mammal. Sharks have their mouth below the skull while dolphin’s mouth is present in front of the skull just like a snout. Sharks have two straight dorsal fins while dolphin has only one curved dorsal fin. Sharks have several rows of teeth in their mouth; on the other hand; dolphin has only a single row of teeth in their mouth. Sharks have rough skin while dolphin has smooth skin. Sharks have dermal denticles present on their skin whereas dolphin has no denticles on their skin. Sharks cannot regulate their body temperature according to their environmental changes, whereas dolphins can regulate their body temperature according to their environmental temperature. Sharks are cold-blooded fishes on the other side dolphin warm-blooded. Sharks have gills as their respiratory organ, whereas dolphin has lungs as their respiratory organs. Sharks have small intestine for digestion while dolphin has long intestine for digestion of food. Sharks live in that waters that are low in salt concentration on the other side dolphins are found in rivers. Sharks have vertical tail fin while dolphin has horizontal tail fin. Sharks are less intelligent than dolphins, whereas dolphins are more intelligent than sharks. Sharks reproduce via ovoviviparity while dolphins reproduce through viviparity. Sharks are known as solitary hunters on the other hand dolphins are known as highly social animals.
Sharks are fishes with cartilage skeleton. They live in oceans. But a few species of sharks can also live in freshwater for a small period. All sharks are cold-blooded fishes. They have streamlined and muscular bodies. Sharks have gills as the respiratory organ. But the gills present in sharks are not covered so they can be easily seen by others. There are approximately three to five gills present on each side of the throat. The body of sharks are not covered by the scales, but there are denticles present on their body skin. Denticles make their bodies very rough. Among all the sharks, the whale shark is the largest one, which is up to 12 meters in length while spiny dogfish shark is the smallest one, which is about 17 cm in length. They do not have a swim bladder. But sharks have large oil-filled liver. Sharks mostly feed on seals, fishes, and penguins. They have very sensitive eyes and ears, and semicircular canals are present in their ears. They cannot see colors. Sharks have four unpaired fins. Their fins are broad and straight in shape. Sharks are known as the natural predators as they attack the peoples and is associated with the fear symbol. They are carnivorous as they have sharp teeth and strong jaws, so they tear their prey easily. Sharks are called the top predator of the marine ecosystem. The life span of sharks is about 30 to 40 years.
Dolphin is a mammal as they have bones in their cartilage. They live in seas and oceans. There are about 40 different species of dolphins that are distributed worldwide. Dolphin lives in shallow waters. The size and weigh of dolphins can vary from species to species; they can be one to ten meters in length. In weight, they can be from 40 kilograms to ten tons. They eat squids and fishes. Dolphins search their food in a specific way that is known as corralling in which they chase the other fishes and their preys. They are more intelligent than sharks and other fishes. Dolphins also have a streamlined body so they can swim easily and very fast. Dolphins have lungs as other mammals, and they use their lungs for respiration. Dolphins usually have a specific color that is grey. On their body, there are no denticles, so their bodies are very smooth. They live in tropical marine and warm waters. They swim by flapping their huge horizontal tail fluke and using their flippers. They also have teeth, so they are known as toothed whales. Dolphins are warm-blooded mammals. Dolphins are highly social animals, so they mostly move in the form of the herd. They are also able to produce high-frequency waves of sound to communicate with other dolphins.
