The questionnaire has three parts, socio-economic characteristics, fish farming practices and agrochemicals use. As the tetrapods emerged deep within the fishes group, as sister of the lungfish, characteristics of fish are typically shared by tetrapods, including having vertebrae and a cranium. When a fish dies, these enzymes help bacteria penetrate the stomach wall. An ammonia-like smell or an overpowering fishy odor indicates the fish is no longer fresh. Fish (plural: fish) are an aquatic group of vertebrates which live in water and respire (get oxygen) with gills.They do not have limbs, like arms or legs, and they do have digits (fingers & toes). Deep Sea Fish - Characteristics. Characteristics.

Data analysis. The swim bladder is a sac inside the abdomen of many bony fishes that contains gas. Scientists use these and many other characteristics to correctly classify and identify fish. This causes fish flesh to start spoiling. Generic fish Graphic: characteristics of fish pectoral fin dorsal fins anal fin pelvic fin barbels snout caudal (tail) fin adipose fin mouth This graphic is a composite illustration that shows a variety of distinguishing characteristics. A fresh fish should have little or no smell. This is a definition which does not quite work: some amphibia also live in water and have external gills, but they are not fish.. Bony fish, any member of the superclass Osteichthyes, a group made up of the classes Sarcopterygii (lobe-finned fishes) and Actinopterygii (ray-finned fishes) in the subphylum Vertebrata, including the great majority of living fishes and virtually all the world’s sport and commercial fishes.The scientific term Pisces has also been used to identify this group of fishes. The digestive tract of living fish contains enzymes. In this deep unknown lie many unusual creatures that have yet to be studied. Fish farmers were evaluated on good practices according to the method described by Gobert (2008).

Fish, as vertebrata, developed as sister of the tunicata. This gas is exchanged between a fish’s bloodstream and the swim bladder depending on whether the fish wants to ascend, descend or maintain neutral buoyancy. The fish of the deep-sea are among the strangest and most elusive creatures on Earth. Data collected were edited, coded and entered in a database system using Microsoft Excel software. Fish used to be a class of vertebrates.