Class Osteichthyes (With Diagram) Bony Fishes. In lung fishes internal nares are also present. 6. Bony fishes have a saclike outgrowth, the swim bladder (also called air bladder), arising from the dorsal wall of the oesophagus, which is airfilled organ, used to maintain balance and to swim up and down. In some fishes, such as Heteropneustes, it helps in respiration. class osteichthyes labeo Characteristics of Super Class Osteichthyes. 1) Skin with mucus gland. Paired fins made of rays and spines, or lobed fins lacking the rays and spines. 2) Various types of scales (ctenoid, ganoid, or cycloid). 3) Marine and fresh water species. 5) External fertilization. 7) No eye lids. 10) Two chambered heart. Operculum covering the gills. Brain with large optic lobes and cerebellum.
Labeo rohita is a common Indian freshwater bony fish. The following description relates to Labeo rohita. This fish is studied as the type specimen of bony fishes in many Indian Universities. Systematic Position: Distribution: Labeo is a tropical genus of carps distributed in tropical Africa and East Indies. class osteichthyes labeo
Class: Osteichthyes. Order: Cypriniformes. Family: Cyprinidae. Genus: Cirrhinus. Species: mrigala. Distribution: It is found in Pakistan, Bangladesh, Myanmar and India. In Northern India its natural habitat is in the stretch from the Punjab to West Bengal and Assam. With such an abundance of species, Osteichthyes are the largest group of vertebrates in the world and the largest class of organisms that live in the ocean. Osteichthyes account for about 96 of Class Osteichthyes. Distinguishing Characteristics fleshy, paired fins, which are joined to the body by a single their fins are webs of skin supported by bony or horny spines, SupportSkeleton bone, swim bladder, scales, operculum Distinguishing Characteristics Sarcopterygii, lobefinned fish, coelac fleshy, paired fins, which are joined to the body by a single. class osteichthyes labeo Class Osteichthyes; Genus Labeo; Species Rohita; COMMENTS: It is a fresh water dweller commonly called rohu fish, widely used as food. Mouth is sub terminal& ventral. A pair each of nostrils& large lateral eyes without eyelids. There are five gills slits covered by operculars. Confused by a class within a class or an order within an order? Please see our brief essay. Additional Information. Encyclopedia of Life; Labeo rohita Roho labeo. Facebook. Twitter. Kingdom Animalia animals. Animalia: information (1) Animalia: pictures ( ) Animalia: specimens (7109) 3. Class Osteichthyes: They are marine or freshwater fishes with bony endoskeleton. The exoskeleton has cycloid or ctenoid scales. E. g. Sardinella (Sardine), Scomber (Mackerel), Exocoetus (Flying fish), Hippocampus (Sea horse), Labeo (Rohu), Catla (Catla), Anabas (Climbing perch). Fig. 4. 19. Osteichthyes: (a) Hippocampus (b) Labeo 4. Labeo Rohita is included in: Phylum Chordata, Subphylum Vertebrata, Super class Pisces, Class Osteichthyes. Morphology. Body is spindle shaped. It is laterally compressed. The dorsal surface is dark gray coloured and belly is white in coulor. It grows upto 80 cm and weighs about 8 kilograms. The body is divisible into head, trunk and tail. Head: