A laterally compressed(flattened, side-to-side) body shap… Most members of this class are parasites and scavengers. Body is covered with triangular placoid scales, This species posses different types of scales. Pelvic and pectoral fins allow the fish to maneuver and maintain its stability while dorsal and ventral fins reduce the rolling motion while the fish is swimming and aids the fish during turns. Fish is used either as singular noun or to describe a group of specimens from a single species.Fishes describes a group of different species.. Types of fish. Something to note here though is that while all fish live in water, not everything that lives in water is a fish. That being said, there are no set shapes, sizes, or even specific purposes for a particular kind of fin. Marine Fishes Classification of Fishes Marine Fish • Marine fish are vertebrates • Some have vertebra made of cartilage, while others have bony vertebra ... • General Characteristics of Group: – About 1000 species – Sharks, rays, skates and ratfishes are members of this group All Fish Are Cold-Blooded. Fishes are first jawed vertebrates. Another shared characteristic amongst all fish is that they live in water. All fish have a swim bladder, which is a specialized organ filled with air that helps ensure fish maintains a stable buoyancy in the water, neither sinking or floating too much. Single dorsal fin is present. Turtles live in water, too, but they’re reptiles, not fish. They are found in fresh, marine, and brackish water. Pelvic fins are situated towards the posterior part of the body. ADVERTISEMENTS: The Superclass Pisces (L. Piscis = fish) are the truly jawed vertebrates. Cichlid Fish belong to the family Cichlidae in the order Cichliformes. Though often used interchangeably, these words have different meanings. 5 Characteristics That All Fish Have in Common 1. Fish are aquatic vertebrates that have vertebral column called spine. The body is usually streamlined. Various species of fishes deviate from the fusiform body shape in three ways: compression, depression, and elongation. Cichlids were traditionally classified in a suborder, Labroidei, along with the wrasses (Labridae), in the order Perciformes but molecular studies have contradicted this grouping. The first group, ganoid ray-finned fish, consists of only four orders. This adaptation also helps the fish to survive in waters that do not have adequate levels of oxygen. One of the basic criteria for an animal to be classified as a fish is the presence of gills throughout its life cycle. It has a spindle shaped body. All fish have gills, but some species of fish living in extremely oxygen-depleted environments have developed lungs as well. Fishes were the earliest vertebrates, with jawless species being the earliest and jawed species evolving later. While there are some rare exceptions to these rules, below is a list of the traits common across these aquatic animals. All fish are cold-blooded, which is also called ectothermic. Whale shark is the largest fish and they can grow to 50 feet long. The body temperature of fish changes as the environment's temperature changes. The first one is one that you already knew: all fish live in water for their entire lives. Freeze dried Tubifex worms, bloodworms, Daphnia, mosquito larva, brineshrimp and vegetation (such as boiled peas and lettuce) are good supplements for these fish. Vertebrate Endoskeletons. Other species are able to survive in wider temperature ranges. As a result, colder waters decrease a fish’s body temperature, which can make them sluggish or go dormant during cold spells (like during the winter months in a lake, for example). 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