### Identification The Antarctic Minke Whale (*Balaenoptera bonaerensis*) is the sleek torpedo of the Southern Ocean. Growing up to 10 meters, it is the smallest of the great rorquals. Look for a sharply pointed snout and a tall, falcate (hooked) dorsal fin that appears simultaneously with its blow. While it resembles the Common Minke, the Antarctic species lacks the bright white flipper band; its pectoral fins are a uniform gray with a thin white leading edge. Its coloration is a complex tapestry of dark gray on the back, transitioning to a pale belly, often featuring light gray "chevrons" or shoulder blazes that sweep up the flanks.
### Habitat & Range This is a creature of the high latitudes. They are strictly Southern Hemisphere residents, found from the equator to the Antarctic ice edge. In summer, they are the most ice-associated of all baleen whales, often seen navigating deep into the pack ice or utilizing leads (cracks in the ice) to breathe. In winter, they migrate north to tropical breeding grounds, though some individuals remain in the frigid Antarctic waters year-round.
### Behaviour Minkes are fast, elusive swimmers, often traveling at 12 knots. Unlike the slow-rolling Blue or Humpback, a Minke "breaks" the surface head-first at a sharp angle. They are famously inquisitive; keep a watch for "spyhopping," where the whale pokes its head vertically out of the water to inspect vessels. While often solitary, they can congregate in "parliaments" of hundreds in rich feeding grounds near the ice.
### Diet They are specialist predators of Antarctic Krill (*Euphausia superba*). Using a technique called lunge feeding, they accelerate toward a swarm, expand their ventral pleats to engulf massive volumes of water, and then use their short, white-to-grayish baleen plates to filter out the tiny crustaceans.
### Fascinating Fact For decades, submarine crews in the Southern Ocean were baffled by a rhythmic, mechanical sound they dubbed the "Bio-duck." It wasn't until 2014 that acoustic tags proved this strange, quacking noise was actually the vocalization of the Antarctic Minke Whale!