Andrews' beaked whale
Mesoplodon bowdoini
One of the least-known whales in the world, almost never seen at sea. No sighting is ever a promise.
Data Deficient (IUCN, 2020) means there is not enough information to judge its risk of extinction, because it is known mostly from stranded animals.
Length
Adults up to about 4.9 m (16 ft) per the Australian Museum; Animal Diversity Web gives up to 4.7 m (15.4 ft). Calves are about 2.0 to 2.2 m (6.6 to 7.2 ft) at birth
Weight
About 1.0 to 1.5 tonnes (2,200 to 3,300 lb) per the Australian Museum; Animal Diversity Web gives a maximum of 2.6 tons. These figures rest on very few stranded animals
Next to a person
About 2.5 to 3 times as long as a tall adult, and as heavy as roughly 15 to 20 adults
What it eats
Not known from direct observation. It is presumed to eat deepwater squid and fish, and possibly crustaceans and animals living on the seabed, caught by suction.
Around people
Very rare, give space
How it lives
Almost nothing is known about its life. Adult males are dark blue-black to brown with a white-tipped beak and sometimes a pale grey saddle behind the blowhole. Females are bluish grey to slate with less white on the beak. The flattened tusks show only in adult males. Animal Diversity Web says it occurs alone or in small groups, but this rests on very few records. Wikipedia notes cookiecutter shark bite scars.
Where it goes
It lives in cool temperate waters of the Southern Hemisphere, mostly between about 32 and 54 degrees south. Most records are strandings, from New Zealand, southern Australia and sub-Antarctic islands, so they show where animals wash up, not where they live. It is thought to prefer deep water, below about 1,000 m.
We only draw a journey on the map when scientists have tracked it or clearly documented it. For this animal we have not found one yet.
Populations
No population estimate exists. The IUCN lists it as Data Deficient (2020), which means there is too little information to judge its risk. It is known from strandings of about 35 animals (Australian Museum) to 48 specimens (Wikipedia), in Australia, New Zealand, Macquarie Island, the Falkland Islands and Tristan da Cunha. Wikipedia says it has not been hunted and no net entanglement is recorded. The Australian Museum says it appears to avoid vessels and is rarely seen at sea.
Meet it respectfully
This whale is almost never seen at sea, and beaked whales are sensitive to noise. If one is ever seen, keep the boat slow and quiet, stay well back, and never chase, surround, touch, feed or bait it. Never expect a sighting. Ask your operator which local rules apply; none were checked for this card.
Fun fact
Tap the bulb to light it up.
It is known mostly from animals that washed ashore. Fewer than 50 specimens have been recorded.
The two flattened tusks in the lower jaw show only in adult males.
Calves are about 2 m long at birth.
Andrews' beaked whale in the Ocean Atlas
Places we have researched where this animal is recorded. It is never guaranteed, and some places are for watching from the boat only.
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Sources for this page
- Wikipedia, Andrews' beaked whale
- Australian Museum, Andrews' beaked whale
- Animal Diversity Web, Mesoplodon bowdoini
- GBIF, IUCN Red List category
Facts checked 5 October 2026. Photos: Unsplash licence, or Creative Commons as shown on each photo.
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