What is basic differences among, a crayfish, prawn and shrimp?

Question

Zoological question, of phylum Crustacea.

Answer 1

Crayfish, often referred to as crawfish or crawdad, are freshwater crustaceans resembling small lobsters, to which they are closely related. They breathe through gills and are found in bodies of fresh water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators. Most crayfish cannot tolerate polluted water, although some species such as the invasive Procambarus clarkii are more hardy. Some crayfish have been found living as much as 3 m (10 feet) underground.

True shrimp are swimming, decapod crustaceans classified in the infraorder Caridea, found widely around the world in both fresh and salt water.

Prawns are distinguished from the superficially similar shrimp by the gill structure which is branching in prawns (hence the name, dendro="tree"; branchia="gill"), but is lamellar in shrimp. The sister taxon to Dendrobranchiata is Pleocyemata, which contains all the true shrimp, crabs, lobsters, etc.

Answer 2

Prawns & shrimps are the same things..
Crayfish are different.

Crayfish :-
1)Crayfish, often referred to as crawfish or crawdad, are freshwater crustaceans resembling small lobsters, to which they are closely related. They breathe through gills and are found in bodies of fresh water that do not freeze to the bottom; they are also mostly found in brooks and streams where there is fresh water running, and which have shelter against predators. Most crayfish cannot tolerate polluted water.
They are of:-
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Astacidea
Superfamily: Astacoidea

2)Prawns are shrimp-like crustaceans, belonging to the sub-order Dendrobranchiata. Prawns are distinguished from the superficially similar shrimp by the gill structure which is branching in prawns.
They are of:-
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Malacostraca
Order: Decapoda
Suborder: Dendrobranchiata

Answer 3

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RE:
What is basic differences among, a crayfish, prawn and shrimp?
Zoological question, of phylum Crustacea.

Answer 4

Prawns and shrimps are the same thing. What are called shrimp in the USA are called prawns in Australia. In the UK, small species are called shrimps and larger ones are called prawns. Crayfish usually cover a group of both fresh and saltwater crustaceae which are larger than prawns and include lobsters. In some parts of the world "lobster" and "crayfish" are interchangeable. Scampi are classed as prawns by some people, crayfish by others. The boundaries are not determined, just go with local usage.

Answer 5

Crawfish Vs Shrimp

Answer 6

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It is a language thing. In British English it is Prawn In American and Australian English it has been changed to Shrimp.

Answer 7

I think its a culture thing,I must admit I never heard of prawns be for my visit to Singapore.Which shows the value of understanding other cultures