Tooth of Extinct Killer Sperm Whale Found in Australia
The huge, five-million-year-old tooth provides the first evidence of the now extinct killer sperm whale outside the Americas.
A huge, five-million-year-old whale tooth has been discovered on an Australian beach, providing the first evidence of the now extinct killer sperm whale outside the Americas.
The 30-centimeter-long (12-inch) fossilized tooth, which is larger than that of a Tyrannosaurus rex, was found by a fossil enthusiast at Beaumaris Bay near Melbourne in February.
"After I found the tooth I just sat down and stared at it in disbelief," Murray Orr said after the find was announced on Thursday by Museum Victoria, to whom he has donated the tooth.
"I knew this was an important find that needed to be shared with everyone."
Museum Victoria said the unique fossil belonged to an extinct species of "killer sperm whale" which would have measured up to 18 meters (60 feet) in length and weighed some 40 tonnes.
It is the only example ever found outside the Americas, it added.
"Until this find at Beaumaris all fossils of giant killer sperm whales were found on the west coast of South and North America," Erich Fitzgerald, a paleontologist at the museum, told the Australian Broadcasting Corporation.
The museum said the tooth, which dates from the Pliocene epoch of some five million years ago, was not only larger than those of a living sperm whale but also of a Tyrannosaurus rex.
Unlike today's sperm whales, which eat a diet of squid and fish, their extinct relatives are thought to have used their bone-crushing teeth to prey on much larger animals, including fellow whales.
"If we only had today's deep-diving, squid-sucking sperm whales to go on, we could not predict that just five million years ago there were giant predatory sperm whales with immense teeth that hunted other whales," Fitzgerald said in a statement.
"Most sperm whales for the past 20 million years have been of the whale-killing kind. So, the fossil record reveals the living species to in fact be the exception to the rule, the oddball of the sperm whale family."
Fitzgerald said Beaumaris Bay was one of Australia's premier fossil sites, providing insights into the history of the continent's marine megafauna.
The world's oldest orca, affectionately known as "Granny" and an estimated 103 years old, paid a visit to the waters off Washington state on May 9 alongside her 25-member pod, "J-Pod." The sighting was a treat for the tour guests of Captain Simon Pidcock's Ocean EcoVentures. Pidcock took the chance to capture Granny in this series of photos.
The grand dame and J-Pod for the majority of the year patrol the waters between the north coast of British Columbia and Northern California.
Pidcock said Granny was instantly recognizable by her saddle patch, a white area whales have on their dorsal fins.
J-Pod was reportedly seen about one week earlier in an area off Northern California -- some 800 miles away from this appearance. This leaves whale watchers feeling confident about the shape Granny is in, if she can make such amazing journeys.
Granny's birth year designation of 1911 derives from her size, the size of her offspring, and comparison photos of the senior-citizen orca from as far back as the 1930s. She was caught once in 1967, but she was released because her age was a bit long in the tooth for sea park life. Who could have imagined that 47 years later she would still be alive and thriving?
Granny's 103 years are about twice the age of the oldest orca in captivity (Lolita, in the Miami Seaquarium, is 50). "It surprises people when they realize this whale was around before the Titanic sank. She's lived through fishing changes and live captures of whales. I would love to know what she thinks," said Pidcock. Photos courtesy of Simon Pidcock and