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 …

A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits. Fish can be grouped into the more basal …

2020年3月29日 · There are about 28,100 species of fishes known to science. They are divided into 4 classes, 59 orders, 490 families and 4,300 or so genera. The classification system of …

2019年8月14日 · The following is an introduction to three basic fish groups: bony fishes, cartilaginous fish, and lampreys. Justin Lewis / Getty Images. Bony fishes are a group of …

There are 5 major groups of fish, however, each class of fish is separated into smaller taxa such as orders, families, genera and species. The major groups also contain various subgroups and …

Fish are social creatures that form groups or schools for survival. A group of fish is called a school, shoal, draft, or run. Different species of fish have different collective nouns, such as a …

2025年3月18日 · Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), and superclass Osteichthyes (bony …

2024年5月21日 · Fish are aquatic vertebrates that typically have gills, fins, and a streamlined body. They inhabit diverse environments, from freshwater rivers and lakes to salty oceans and …

2023年1月3日 · Instead, there are 3 main classes, groups, or types of fish: bony fish (Osteichthyes), jawless fish (Agnatha), and cartilaginous fish (Chondrichthyes). Fish are the …

2020年7月14日 · Fish live in this world of water and are the most numerous of the vertebrates, or animals with backbones. There are three major groups of living fish. The first group is the …