In the 10th edition of Systema Naturae, Carl Linnaeus described the Pisces as: "Always inhabiting the waters; are swift in their motion and voracious in their appetites. They breathe by means of gills, which are generally united by a bony arch; swim by means of radiate fins, and are mostly covered over with cartilaginous scales. Besides the parts they have in common with other animals, they are furnished with a nictitant membrane, and most of them with a swim-bladder, by the contraction or dilatation of which, they can raise or sink themselves in their element at pleasure." Linnaean Characteristics

Apodes

Jugulares

Thoracici

Cyclopterus

Echeneis

Coryphaena

Gobius

Cottus

Scorpaena

Zeus

Pleuronectes

Chaetodon

Sparus

Labrus

Sciaena

Perca

Gasterosteus

Scomber

Mullus

Trigla

Abdominales

Branchiostegi