Numerous animals are distinguished by their coats of spines and quills. Countless insects, too, are wrapped in tough, thorny skin. And several species of fish are known for their showy, lance-like fins. Spines, spikes, and hair serve many functions including insulation, camouflage, and defense. They add character and quite often color to creatures that many of us have probably never heard of. And some are truly bizarre in appearance!
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