You can find a sea spider living in marine habitats all over the world , from shallow waters to the deep sea. They have the same eight legs you'd expect from land spiders, and like most species of spiders , sea spiders have segmented bodies and protective exoskeletons made of chitin.

Fossil records show that sea spiders have existed for hundreds of millions of years, boasting an ancient lineage within the world of marine invertebrates. Let's dive a little deeper.

What Do Sea Spiders Look Like?

These marine arthropods span a wide range of sizes. Some are minuscule, with a leg span of only 0.4 inches (1 centimeter). The largest sea spider species are found closer to the North and South Poles, and they can have a leg span of up to 28 inches (70 centimeters).

Their trunks are small

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