please tell me the name of FISH which can survive both inside and outside the water.?

Answer 1

If by "surviving" you mean long periods of time, then the lungfishes (there are several species) are the answer.
Lungfish have reduced gills and also lungs, and some of them are able to estivate (spend the dry summer season) in caves that they dig in the mud, surrounded by mucus, until the rains come again. This is something that African and South American lungfishes can do (genus Protopterus and Lepidosiren, respectively) but not the Australian species (Neoceratodus forsterii).

There are also many fish that can use part of the lining of their guts to breathe, and thus can resist during some time outside the water. These include catfish and their relatives (especially the armored catfish), the tropical swamp eels (Synbranchiformes), the mudskippers (a type of goby fish), and probably many others.

Here's some information
About lungfish:
http://www.ucmp.berkeley.edu/vertebrates/sarco/dipnoi.html

About a well-known air-breathing catfish, genus Clarias:
http://jeb.biologists.org/cgi/reprint/55/2/421
Others: armored catfish:
http://www.fishbase.org/Summary/FamilySummary.cfm?ID=156
http://www.fishbase.org/Summary/FamilySummary.cfm?id=157

Swamp eels (family Synbranchidae):
http://www.fishbase.org/Summary/FamilySummary.cfm?ID=262

Mudskippers:
http://www.aquariacentral.com/fishinfo/brackish/mudskip.htm

Answer 2

Lung Fish Lungfishes are fish belonging to the order Dipnoi. Lungfish are best-known for retaining characteristics primitive within the Osteichthyes, including the ability to breathe air, and structures primitive within Sarcopterygii, including the presence of lobed fins with a well-developed internal skeleton. Today, they live only in Africa, South America, and Australia. While vicariance would suggest this represents an ancient distribution limited to the Mesozoic supercontinent Gondwana, the fossil record suggests that advanced lungfish had a cosmopolitan freshwater distribution and that the current distribution of modern lungfish species reflects extinction of many lineages following the breakup of both Pangea and subsequently Gondwana and Laurasia.

Answer 3

Lungfish, some species of catfish, mudskippers, and bettas can survive outside of water for long periods of time as long as they are moist.

Answer 4

Flying fish leap out of deep water

And there are some little mud dwelling fish in tropical waters, which breathe air when the tide goes out. Sorry I've forgotten their name

Answer 5

Lungfish.It has gills as well as lungs, so it can also breath air. It hibernates for long periods buried in mud when the lake/river dries up, but still needs to remain wet to survive.

Answer 6

That would be one of the lungfish family

Answer 7

A mermaid fish
u need to b lukcy to c dat

Answer 8

catfish

Answer 9

snakefish also

Answer 10

CATFISH