(sj130-13) 4" Great White Shark lower outside skin specimen denticles sharks

Description

(Internal #SJ130-13).
RARE NEVER BEFORE OFFERED!
This is a genuine specimen of GREAT WHITE SHARK skin from lower outside of a jaw.
Yes there are dermal denticles
showing on it
.
Hide is thick/stiff.
Great for educational purposes, craft or just as a collectible shark item.
MEASURES: 4" long x 1-3/8" widest.
This is the exact item you would receive.
Shark skin is made of a matrix of tiny, hard, tooth-like structures called dermal denticles or placoid scales. These structures are shaped like curved, grooved teeth and make the skin a very tough armor with a texture like sandpaper. They have the same structure as a tooth with an outer layer of enamel, dentine and a central pulp cavity. Unlike the scales of scales of bony fish (ctenoid scales) that get larger as the fish grows, placoid scales stay the same size. As the shark grows, it just grows more placoid scales.
These scales also help the shark swim more quickly because their streamlined shapes helps decrease the friction of the water flowing along the shark's body, by channeling it through grooves. Also, the shark's skin is so rough that contact with it can injure prey. All of the spines of the denticles point backwards (towards the tail), so it would feel relatively smooth it you moved your hand from head to tail (but rough the other way).
THIS IS A RECYCLED MATERIAL- A SHARK WAS NOT KILLED FOR ITS SKIN.  IT IS CAUGHT LEGALLY & USED AS FOOD, other body parts are usable in the secondary market for educational/collectible purposes.
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