Berardius arnuxii   Duvernoy,  1851 (Whale)
Organism information awaits expert curation
Class: Mammalia

Size: 8-12 m

They have long, tubular bodies and blunt or rounded flippers. The dorsal fin is set far back on the body and is relatively small for a beaked whale (about 3% of the total body length). It has a straight leading edge and concave trailing edge. They have a prominent melon which slopes down into the distinctive ‘beak’ or ‘bottlenose’ of ziphiids. The lower jaw protrudes past the upper jaw. A pair of triangular shaped teeth are present on this protrusion while a second pair of peg-like teeth sit farther back behind a short diastema. These two pairs of teeth are characteristic of the genus Berardius and erupt in both males and females when the individual reaches sexual maturity. A deep V-shaped groove on the throat that consists of folds in the skin and blubber is also distinctive of Berardius.

Juveniles are slate grey, while older, sexually mature individuals range from very dark to light grey and are generally lighter on the head. Some individuals may appear brown or green colored due to diatoms attached to the skin. Numerous white scars are apparent on sexually mature individuals and seem to accumulate with time as older individuals have more scarring than their younger counterparts.

Reproduction: The mating system of B.arnuxii is not known. Breeding season- Unknown

Lifespan: 84 years in males and 54 years in females 

Synonym (s)
Berardius arnouxi Flower, 1874

Common Name (s)
• Arnoux's Beaked Whale (English)
• Southern Four-toothed Whale (English)
Economic Importance and Threats
Threats:  Anthropogenic
(Arnoux’s beaked whale has never been hunted to any significant degree, and direct anthropogenic threats are not known. However, a few whales have been taken for scientific study.)
Threats:  Natural threats
(Arnoux's beaked whales have been reported trapped in sea ice, which may contribute to natural mortality)

Habitat:  Open Sea
Prey:  Benthic and pelagic fishes, cephalopods and squids
IUCN Status:  Data Deficient


Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • (2003) IUCN Red list of threatened species Available at -
  • Pillai, PKM and Augustine, SK (2000) A code list of common marine living resources of the Indian seas CMFRI Special Publication No.12 CMFRI 1-115 Available at -
  • Myers, P; Espinosa, R; Parr, CS; Jones, T; Hammond, GS and Dewey, TA (2006) Animal diversity web Available at -

Page last updated on:2013-03-01

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