UPSC

Home General knowledge English Hindi Current affears History Geography Previous Next About Articles

Union public service commission exam study notes

Fin fish

There are basicaly two type of fishes. Thay are Fin fish and Shellfish. Fin fish is a fish that is a bony fish, such as a salmon, sadain Sardinella longiceps or a cartilaginous fish, such as a shark and southern stingray (Hypanus americanus) especially in contrast to a shellfish or other aquatic animal. Any fish Other than flat fish is technically fin fish. Fish that do have fin, Fin is a thin component or appendage attached to a larger body or structure. There are dorsel fin, Ventral fin Anal fin, Lateral fin, Adipose fin,Caudal fin and Oral fin.

facts about the fin fish

In the sea the dorsel fin is on the top of the fish and it can be identified on the top of the fishy body. Fin rays is part of fin and it is projuctions form the dorsal fin it can bleed if touched. A line in the center of the fish is lateral line, Ventral fin It is below the fish and can only see if we take out the fish or in an Aquarium.

Some Extras

Fin fish aqiaculture has been suggested as a vector for intriducing non native and potentially invasive species. (Naylor, Williams, & Strong, 2001). Vivekanand Bharti,CMFRI Finfish can be defined as cold-blooded aquatic craniate vertebrate with fins for locomotion and gill for respiration. About 33,218 species of finfish has been identified in the world at present time. It may live in freshwater, brackish water and marine water. The skeleton of finfish is made up of either bone (called bony finfish) or cartilaginous (called cartilaginous finfish).

features

External morphology of fin fish can be used for the Identification of the species. shape of body and parts mouth locationand size tail shape and colour. meristic characters are counting of spine ray etc in fin or other part of body.

meristic characters

It can be devided into two parts part one is head and it consist of Snout. Lips, Mouth, Jaws, Teeth, Barbels, Norstril, Eyes, Opreculum and gills. in the part two Body includes fins, Lateral line ,Skin and Scales.

There are four type of mouths they are Terminal mouth superior mouth, Inferior mouth and Protrusible mouth. There are six type of Caudal fins they are roun fin, forked fin, indented fin, square fin, lunate fin, pointed fin. Fish also have finlets to make the body more aquatic. Body shapes are Anguilliform, Taeniform, ovate, Depressiform.

Last updated the server @ : 20^th August 2023::17:18 (c) Abhinav