Morphology of a bony fish: finned aquatic vertebrates animal with skin covered with scales. It lives in water and is usually oviparous.
Eye: sight organ of a fish.
Operculum: pair of rigid plates covering and protecting the gills of a fish.
Lateral line: central line dividing a fish lengthwise.
Spiny ray: spine travelling the length of a fin.
Dorsal fin: locomotive limb situated on the back of a fish.
Caudal fin: locomotive limb situated at the end of a fish.
Anal fin: locomotive limb situated behind the anus of a fish.
Pelvic fin: locomotive limb situated beneath the pelvic girdle of a fish.
Scale: each of the small hard plates covering a fish.
Pectoral fin: locomotive limb situated at the chest of a fish.
Mandible: lower jaw.
Mouth: entrance of the digestive tract.
Maxillary: bone forming the upper jaw.