Underwater with Sri Lanka’s sperm whales- in paintings

A newly identified population in the Indian Ocean is attracting the attention of scientists, conservationists and soon, tourists, too. How will this whale climate the new storm of attention?

Every March, vast numbers of sperm whales gather in the deep waters north-west of Sri Lanka. Andrew Sutton’s photographs are vivid evidence of a little-known population- all the more surprising since sperm whales are the largest active predators on the planet with males reaching nearly 20 m( 65 ft) in duration. As natural submarines, they shut down all their organs except for their heart and brain, and using their muscular tails are able to dive for up to a mile, spending up to two hours feeding on squid.


Sperm whales ( Physter macrocephalus ) may be huge, but they’re difficult to see, spending 90% of their lives in the deep. As vision is useless, they use sonar clicks to situate squid. The sound is amplified by petroleum in their heads known as spermaceti( once believed to be the animal’s semen, hence its common name) which has bio-acoustical properties. The outcome is the loudest animal noise in nature, able to stun or kill prey. But the clicks are also modulated for communication, in sequences known as codas. Audible over many miles, the sequences vary from one “clan” to another, like human dialects. Diving with the whales, I’ve often felt, rather heard, this deep interconnection- a sonic whale-wide web.


Last year Andrew and I dove with a super-pod of 150 sperm whales here, many in mating mode. We watched a pair of whales swim belly-to-belly under our tiny fishing barge, so engaged in their coupling that they seemed blissfully unperturbed by the humans hanging a few feet over them. The young whale in the middle of this photograph is evacuating her bowels- not a great moment to be swimming behind a whale, as Andrew and I discovered to our cost.


With eyes set either side of their heads, sperm whales have to turn upside-down, like this female, for a 3D position of us. But she may also be “presenting” herself, ad her willingness to mate. The Sri Lankan gathering is a cetacean” spring infringe “. But it’s also a positive indication of the relative health of the global sperm whale population, estimated at 360,000, according to the scientist, Hal Whitehead.


Sperm whales began to evolve 25 million years ago; they now possess the biggest brains on the planet. They are defined by matriarchal culture, passed on from mom to calf; learned, rather than instinctive behaviour. Like other toothed whales, sperm whales act as” collective someones “. Their loyalty can have tragic consequences, as the recent stranding of pilot whales in Australia shows.

Sperm whales strand too, but are too large to be rescued and are often euthanised to end their suffering.


We find these beasts through an anthropomorphic lens; as a landbound species, that’s the way that our culture tries to come to terms with theirs. They are mysterious selves, living in an foreigner world. Talking to scientists such as Whitehead, Luke Rendell and Shane Gero, I often feel I’m interviewing astronauts who’ve discovered extraterrestrial species. The wonder is the way we treated them. We “harvested” sperm whale petroleum for lighting, lubrication or cosmetics- the “cold cream” on my mother’s face when I kissed her goodnight contained spermaceti. Now we watch the whale as insignium of a threatened planet, as if we were ready to build a new ark, as proposed by the contemporary artist, Angela Cockayne.


Placid by nature, sperm whales have no predators, apart from killer whales- and human being. As the whale-hunters aimed their harpoons at the largest males, the species was genetically reduced in size. Historic sperm whale jawbones suggest animals of 80 or 90 feet in duration were once common. We may no longer hunt this species, but we still have drastic consequences on them. When 29 sperm whales stranded around the North Sea in 2016, large pieces of plastic were located in their bellies. Organochlorines and heavy metals such as mercury, lead and chromium add to the toxic mix, as does the amount of sound we pump into the sea.


Our passive interest, too, can affect whales. After the ending of the war with the Tamil Tigers in 2009, Sri Lanka’s tourists increased the pressure on another newly discovered population- of gigantic blue whales off Mirissa, at the southern tip of the island. Andrew, who like myself acts as a special ambassador for Whale and Dolphin Conservation( WDC ), carries professional concern about unrestricted whalewatching. With multiple barges competing to put their passengers” right in specific actions”, he fears that the mix of inexperience and absence of monitoring will be disastrous for the whales’ foraging and socialising.

Read more: www.theguardian.com

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