What was the role of the DSV Alvin in the discovery of the 'Yeti Crab'?

The Yeti Crab was first viewed by marine biologists using ALVIN (DSV-2) to explore hydrothermal vents along the Antarctic-Pacific border, south of Easter Island. During one dive, French marine biologist Michel Segonzac noticed the crab and asked ALVIN's pilots to collect a specimen for return to the surface.