Sponge spicule
（重定向自Megasclere）
![Sponge spicules](/Images/godic/202501/26/MicroscopicSpiculesfromPachastrellidSponge4849.jpg")
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![Scanning electron microscope images of various microscleres and megascleres of demosponges](/Images/godic/202501/26/Demospongiae_spicule_diversity4849.png")
Spicules are structural elements found in most sponges. They provide structural support and deter predators. Large spicules that are visible to the naked eye are referred to as megascleres, while smaller, microscopic ones are termed microscleres.