In the members of this order, each tooth had a long base composed of a bonelike tissue.
A variety of receptors, especially for detecting substrate vibrations, have been described for members of this order.
Members of this order are important as sources of food, in the production of drugs and chemicals, and especially as ornamental plants.
Two carnivores are probably the animals most familiar to people: the domestic dog and cat, which are both derived from wild members of this order.
Although some freshwater fishing interests may regard herons as undesirable competitors, on the whole the members of this order are considered to be either beneficial or neutral in respect to the economy.
In addition to being egg layers (oviparous), members of this order share primitive skeletal features such as the shoulder girdle and skull characteristics that have been lost in other living mammals.
Members of this order grow as unbranched filaments, typically with a single pyrenoid for storage of starch reserves, and and one or two chloroplasts against the inner side of each cell.
With the exception of the relatively deepwater Triacanthodidae and Triodontidae, the members of this order are usually found in waters less than about 65 metres (200 feet) in depth and are especially prominent around coral or rocky reefs and on open sand and grass flats.
A member of the order Tetraodontiformes, which also includes pufferfish, porcupinefish, and filefish, the sunfish shares many traits common to members of this order.
Members of this order are eel-like aquatic salamanders with much reduced forelimbs and no hind limbs.
