(diamond-shaped) and connected by peg-and-socket joints. They are usually thick and fit together more like a jigsaw rather than overlapping like other scales. In this way, ganoid scales are nearly impenetrable and are excellent protection against predation.

In sturgeons, the scales are greatly enlarged into armour plates along the sides and back, while, in the bowfin, the scales are greatly reduced in thickness to resemble cycloid scales.

Native Americans and people of the Caribbean

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