The Pycnogonida (sea spider) are of the Anthropoda phylum with various families and species including the Pseudopallene circularis.
Sea spiders are usually found in the Mediterranean Sea but are also found in the Atlantic and Artic Oceans, and the Caribbean Sea. They look similar to normal spiders but are generally larger.
An adult male can be as big as 2.8 feet (76 centimeters) and as small as 5 centimeters, and can weigh up to .7kg (1 pound) or as little as .01kg (.1 pounds). The largest region of the body contains four small eyes and a mouth at the end of a long tube called the proboscis.
Sea Spiders appear to have come from a crab and an early spider. They mainly feed on sponges. Their single defense is a poison in their legs.
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