Which baleen whale species has the largest global population?

The minke whale has the largest global population among baleen whale species. The name covers closely related forms, including the common minke whale and the Antarctic minke whale.

Minke whales are relatively small rorquals, but their wide distribution and ability to exploit both fish and krill help explain their abundance. Common minkes inhabit northern oceans, while Antarctic minkes occupy Southern Ocean waters. Their populations are spread across many regions rather than concentrated in only a few feeding grounds.

This answer is easy to confuse with the blue whale because the blue whale is the largest animal ever known. Size and population are different measurements: blue whales are enormous but much rarer after centuries of commercial whaling. Humpback and gray whales are also more familiar to many people, yet neither has the minke whale’s worldwide abundance.

Minke whales use baleen to filter food and often lunge through prey schools. The common minke is the smallest of the great rorquals, reaching roughly 7–10 metres in many populations. Despite their abundance, they still face threats including entanglement, vessel strikes, ocean noise and whaling.