Sei whales are currently listed as "Endangered" on the IUCN's Red List and were also heavily exploited by commercial whaling fleets before becoming protected by federal and international laws. Little is known about this elusive giant, so any data on its presence in New York's coastal waters can help in management decisions. The WCS-New York Aquarium/WHOI research effort has now detected three whale species in New York Bight: the North Atlantic right whale, the sei whale, and the second largest animal on the planet, the fin whale. The acoustic buoy's most recent detection (made November 16th) was a fin whale, one of several detections of fin whales made since the buoy was deployed to its current location 22 miles south of Fire Island on July 23rd.