The embeded specimen is no smell, no toxicity. They can be presserved for long and easier to carry than those saved in formalin liquid.

Skeleton of a fish: finned vertebrate animal with skin covered with scales. It lives in water and is usually oviparous.
Opercular: pair of bony plates covering the gill opening.
Ray of the anterior dorsal fin: each of the small bones forming the front fin on the back of a fish.
Radial cartilage: elastic substance of the radius.
Ray of the posterior dorsal fin: each of the small bones forming the rear fin on the back of a fish.
Neural spine: spine containing part of the nervous system.
Vertebra: each of the bones forming the neural spine of a fish.
Hypural: bone to which are attached the spiny rays of the caudal fin of a fish.
Caudal fin ray:

each of the small bones forming the tail fin of a fish.
Anal fin ray: each of the small bones forming the fin behind the anus of a fish.
Radial cartilage: elastic substance of the radius.
Rib: each of the bones forming the thoracic cage.
Pelvic fin ray:

each of the bones forming the fin beneath the pelvic girdle.
Pectoral fin ray: each of the bones forming the chest fin.
Pelvic girdle: set of bones forming the pelvis.
Clavicle: shoulder bone.
Lower jaw: mandible.
Upper jaw: upper part of the mouth.
Orbit: cavity of the skull that contains the eye.
Skull: bony case of the brain of a fish.