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Fishes are a paraphyletic group and for this reason, the class Pisces seen in older reference works is no longer used in formal taxonomy.Traditional classification divides fish into three extant classes (Agnatha, Chondrichthyes, and Osteichthyes), and with extinct forms sometimes classified within those groups, sometimes as their own classes: [1]
Class Cephalaspidomorphi - lampreys; Superclass Gnathostomata Vertebrates with jaws Class Chondrichthyes (cartilagineous fish - sharks and rays) Class Osteichthyes (bony fish), which has two subclasses: Actinopterygii (ray-finned fish) Sarcopterygii (lobe-finned fish) Full details of higher order fish taxonomy can be found in the Chordata article.
Dr. Modadugu Vijay Gupta (17 August 1939) is an Indian biologist and fisheries scientist. He was awarded the World Food Prize in 2005, for development and dissemination of low-cost techniques for freshwater fish farming (using tilapia species) by the rural poor. [ 1 ]
Fish were observed floating inverted completely motionless with the illicium hanging down stiffly in a slight arch in front of the fish. The illicium was hanging over small visible burrows. It was suggested this is an effort to entice prey and an example of low-energy opportunistic foraging and predation.
[56] One day, Gupta's technical assistant announced that he had evidence of the sources of fossil frauds and was planning to reveal them; he was killed in a hit-and-run accident the following night. [5] Gupta also put a price to whoever would make physical assaults on the co-authors of the Courier paper, Goel and Kumar. A few days later, the ...
Parambassis ranga, commonly known as the Indian glassy fish, Indian glassy perch, or Indian X-ray fish, is a species of freshwater ray-finned fish in the Asiatic glassfish family Ambassidae. It is native to an area of South Asia from Pakistan to Vietnam , Malaysia and Bangladesh .
Rhipidistia, also known as Dipnotetrapodomorpha, [1] is a clade of lobe-finned fishes which includes the tetrapods and lungfishes.Rhipidistia formerly referred to a subgroup of Sarcopterygii consisting of the Porolepiformes and Osteolepiformes, a definition that is now obsolete. [2]
The guppy (Poecilia reticulata), also known as millionfish or the rainbow fish, [3] is one of the world's most widely distributed tropical fish and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing. [4]