Hantu's creepy crawlies...

"Sea spiders" or pycnogonids, are members of Phylum Arthropoda, along with land spiders.

Like their land-lubber cousins, sea spiders are carnivorous, some feeding on other invertebrates by sucking out the juices, while others tear their prey apart and pass it into a proboscis for feeding. The digestive system extends into the legs, and the pair of simple eyes are positioned near the end of the trunk.

As a diver, sea spiders are not commonly encountered. Because of their extremely small size, unusual shape, and lack of movement they don't tend to attract attention to themselves. This photograph was captured on Saturday, January 21, by "FatJim", a diver from the FinsOnline Forum found the three (YES! Three! Can you spot them?!) pictured here crawling on a hydriod, which seems to be a common hangout for these strange creatures. They move very slowly-- so slowly, in fact, it's sometimes hard to tell if one is alive.

For further information, the University of California Museum of Paleontology maintains a page titled Introduction to the Pycnogonida. The Melbourne Museum's Infozone features an info page with a video clip. For a detailed anatomical description and diagrams, see Dr. Richard Fox's Sea Spider online laboratory page, sponsored by Lander University, South Carolina, USA.

More of FatJim's pix
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