The difference between Dogfish and Shark
When used as nouns, dogfish means especially those from the family squalidae, whereas shark means a scaleless, predatory fish of the superorder selachimorpha, with a cartilaginous skeleton and 5 to 7 gill slits on each side of its head.
Shark is also verb with the meaning: to fish for sharks.
check bellow for the other definitions of Dogfish and Shark
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Dogfish as a noun (UK):
Any of various small sharks especially those from the family Squalidae a catshark, any shark from family Scyliorhinidae a kitefin shark, any shark from family Dalatiidae Scyliorhinus canicula or Scyliorhinus stellaris Scyliorhinus canicula or Squalus acanthias, , , or
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Dogfish as a noun (US):
The bowfin, Amia calva.
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Shark as a noun:
A scaleless, predatory fish of the superorder Selachimorpha, with a cartilaginous skeleton and 5 to 7 gill slits on each side of its head.
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Shark as a verb (rare):
To fish for sharks.
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Shark as a noun:
Someone who exploits others, for example by trickery, lies, usury, extortion.
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Shark as a noun (informal, derogatory):
A sleazy and amoral lawyer; an ambulance chaser.
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Shark as a noun (informal):
A relentless and resolute person or group, especially in business.
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Shark as a noun (informal):
A very good poker or pool player. Compare fish (a bad poker player).
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Shark as a noun (sports, and, games):
A person who feigns ineptitude to win money from others.
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Shark as a verb (obsolete):
To steal or obtain through fraud.
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Shark as a verb (obsolete, intransitive):
To play the petty thief; to practice fraud or trickery; to swindle.
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Shark as a verb (obsolete, intransitive):
To live by shifts and stratagems.
Examples:
"rfquotek Beaumont and Fletcher"
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Shark as a verb (obsolete):
To pick or gather indiscriminately or covertly.