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.

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EN : Aquatic vertebrates
FR : Vertébrés aquatiques
ES : Aquellos vertebrados


Aquatic vertebrates that are cold-blooded, covered with scales, and equipped with two sets of paired fins and several unpaired fins. Aquatic vertebrates are abundant in the sea and in fresh water, with species being known from mountain streams as well as in the deepest depths of the ocean. They are of tremendous importance as food for people around the world, either collected from the wild or farmed in much the same way as cattle or chickens. Fish are also exploited for recreation, through angling and fishkeeping, and fish are commonly exhibited in public aquaria.

Animation : Fish