Cetacean
Dwarf minke whale
Balaenoptera acutorostrata subsp.
An unnamed dwarf subspecies of the common minke whale, found mainly in the Southern Hemisphere. Exceptionally inquisitive, they approach boats and swimmers and often stay for extended interactions. The northern Great Barrier Reef holds the only known predictable aggregation of the whale in the world. Conservation status is assessed at the common minke whale species level (least concern); the dwarf subspecies is not separately IUCN-listed.
- Max size
- Up to ~8m
- Habitat
- Open water and outer reef; winter aggregation on the northern Great Barrier Reef
Best places to dive with Dwarf minke whale
| Month | Likelihood |
|---|---|
| January | not seen |
| February | not seen |
| March | not seen |
| April | not seen |
| May | rare |
| June | peak season |
| July | peak season |
| August | rare |
| September | not seen |
| October | not seen |
| November | not seen |
| December | not seen |
Strongly seasonal: the aggregation forms on the northern Ribbon Reefs in June and July only, coinciding with the whales' winter migration. Roughly 60-80 whales are thought to congregate off the northern Ribbon Reefs in those months. Operators cite about a 98% seasonal success rate, but any single encounter is not guaranteed. Effectively absent the rest of the year.
Sources & last checked
Checked July 2026
This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.
- The Minke Whale Project — James Cook University
- Common/Dwarf minke whale — Wikipedia
- Minke Whale Great Barrier Reef Expeditions — Mike Ball Dive Expeditions
Note on the data: Swim-with encounters are restricted to endorsed operators under a GBRMPA code of practice, with a Minke Whale Project researcher aboard each expedition.