Sea urchins' spines are their ingenious armor
Sea urchins use movable, sharp spines as a primary defense, protecting their soft bodies from predators and playing a crucial role in maintaining marine ecosystems.
Sea urchins protect their soft bodies with an external skeleton covered in long, sharp spines. These spines, which can be over 30 centimeters long in some species, attach with ball-and-socket joints, allowing them to move and deter predators like octopuses. Some even have venomous tips, delivering toxins for enhanced defense.
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