Slow waves meander westward out in the deep ocean south of Australia. Sometimes they carry with them carry large eddies, whirlpools over 100 miles across. But every so often, these whirlpools combine into double whirlpools and travel across the ocean 10 times faster than the rest of the whirlpools, moving in sync for…
Source: Gizmodo – Scientists Observe Strange Double Whirlpool Effect in Ocean for First Time