A sea spider is a spider that dwells under water. The only physical appearance of a sea spider is in "Patrick's Coupon" where Patrick encounters one.
The sea spider looks similar to the sea urchins. In "Patrick's Coupon," they look very similar to real Spiders with a grayish body and red eyes. The spider's legs are hairy and are extended to suit the body. They also have a gland on their abdomen to spin out webs. It should also be noted that Sea Spiders have monstrous teeth, most likely meant for their prey and predators.
The sea spider is mentioned several times in "Life Insurance" and has only one physical appearance seen in "Patrick's Coupon."
I can turn into a skyscraper!
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