In the case of some mollusks, the trap itself may be what attracts them.  A
traditional method of fishing for octopus is to lower an old jar on a line
and give the octopus time to move in.  Dr. Ruth Turner has studied deep-sea
wood-boring bivalves by sinking boards to the bottom and retrieving them.
 
 
David Campbell
[log in to unmask]
 
"Old Seashells"
Department of Geology
CB 3315 Mitchell Hall
University of North Carolina at Chapel Hill
Chapel Hill NC 27599-3315
919-962-0685
FAX 919-966-4519
 
"He had discovered an unknown bivalve, forming a new genus"-E. A. Poe, The
Gold Bug