A sea spider, or pycnogonid, seen at a depth of 2,210 meters ( feet) during Dive 02 of the Seascape Alaska 3 expedition. Despite their common name, sea spiders are not “true” spiders, though both sea spiders and land-dwelling spiders belong to the phylum Arthropoda.
Sea Spider
Image courtesy of NOAA Ocean Exploration, Seascape Alaska. Download larger version (jpg, 1.6 MB).

A sea spider, or pycnogonid, seen at a depth of 2,210 meters ( feet) during Dive 02 of the Seascape Alaska 3 expedition. Despite their common name, sea spiders are not “true” spiders, though both sea spiders and land-dwelling spiders belong to the phylum Arthropoda.