Really interesting to read about the anglers and their habitat:

http://www.dailykos.com/story/2009/5...Sargassum-Fish

Quotes from the link above:

"Out in the middle of the Atlantic Ocean is a roughly million-square-mile area known as the Sargasso Sea. On the surface of this sea is an enormous mat of entangled, floating algae, kept in place by a combination of ocean currents and lack of winds. The movement of the currents which surround this sea, including the Gulf Stream, the Equatorial, the Canary and the Caribbean, collude to entrap anything that floats into this area and keep it, mostly, from escaping."

"They are so dependent on the sargassum that if a clump of weeds is pushed out of the Sargasso Sea and into the Gulf Stream Current by tropical storms, the fish will remain with its cover for weeks or months at a time, giving it a chance to flow all the way to our shores. I've found some still clinging to weed remnants barely larger than itself. In fact, if the weed is washed ashore, the fish will die on the beach with its host rather than abandon it."