The Case of the Missing Seamonster

'Do you feel an uncomfortable heat at the pit of your stomach, sir? and a nasty thumping at the top of your head?

It will lay hold of you... I call it the detective-fever' (1).

Only in my case, it turned out to be dysentery. Twice. 

As a biologist and avid scuba diver, I dreamed for years of a job which would allow me to spend my days underwater, on warm tropical reefs, counting colourful fishes or otherwise living life as a beach-bum-with-purpose. Instead, I have ended up wandering through Africa's mangroves and rivers in search of bizarre and highly endangered creatures: sawfishes. I may go for weeks without even glimpsing a beach, and spend far too much time cleaning mud out of my ears (first rule of working in mangroves: mud will get everywhere). Some days, the only fish I see lie in still, silvery heaps amidst the chaos of local markets, or floating in palm oil next to a mountain of rice on my dinner plate. Meanwhile, colleagues post instagram photos of themselves in azure waters next to a majestic whale shark/ manta ray/ *insert glamorous marine megafauna species name here*. As if my envy wasn't enough, funding organisations also love such dramatic images: the dance between graceful manta ray and human diver, the moment of connection. And somehow, I know that there will be no 'moment' between me and a sawfish in the crocodile-infested, chocolate-coloured waters of a Mozambican mangrove channel. But the world needs sawfish research. How then, I have wondered, might I convey the magic amidst the mud and the sense of discovery that my work gives me, to spark in others an interest in sawfish conservation? 

I grew up watching Agatha Christie's 'Poirot' on television with my grandmother, and later devoured all the Sherlock Holmes stories I could lay my hands on, captivated by his skills of observation and interpretation. Recently, whilst travelling the north and west coasts of Madagascar to conduct research on sawfish, I spent my evenings reading 'The Suspicions of Mr. Whicher'(2), a story based on a real murder investigation in the 1800s, which inspired a generation of writers, including Arthur Conan Doyle (author of the Sherlock Holmes stories). The story charts the development of the detective as a new entity in Victorian society, tasked solely with solving mysteries too complex for the police. He collected evidence, mainly through interviews and his own observations, and made deductions. Author Kate Summerscale notes that 'the progress of a detective was backwards.....The solution to a crime was the beginning as well as the end of the story'.

Reading about the development of this process, it dawned on me that searching for sawfishes is a lot like being a detective. To discover where sawfishes still exist, I first need to go back to the past, to document the places they used to inhabit, track their decline in each place and uncover the causes, known or suspected, for those declines. Perhaps I’m not so far from my hero, Sherlock Holmes, after all.

The author of 'The Suspicions of Mr. Whicher' also describes how interviews conducted with suspects in a case often revealed 'gaps, contradictions, indications of further secrets' but nonetheless, a good detective was able to find the truth amidst the confusion, leading to the discovery of the perpetrator of the crime. Over almost five years of interview work, I have learned that just like detective work, interviewing is a fine art. Sometimes conflicting information comes from two different interviewees in the same village, and sometimes a fisher may change his or her story as the interview progresses. My job is to sift through these responses and find useful clues. I have learned to recognise the signs of valuable information - those fishers who have caught or observed many sawfishes over the years and can describe in detail how sawfishes use their rostrum or 'saw' to find and kill the small fish they eat, or who know precisely the times of year when sawfishes used to visit their waters, for example. Their knowledge can lead me closer to the truth about sawfishes in African waters – the habitats they used regularly, the causes for their decline or even local extinction and most importantly, those secret corners where sawfishes still exist. Stumbling across four or five sawfish rostra over the course of a morning in a tiny fishing village is also an exciting sign that sawfishes used to be caught regularly by local fishers, and maybe still are. 

In 'The Hound of the Baskervilles'(3), Sherlock Holmes spent some weeks in an 'old stone hut' on Dartmoor in southwest England, observing the comings and goings of local people, their habits, their work, all the while living off scarce rations and braving the elements of the moor. On my recent trip to Lac Kinkony, Madagascar's second biggest lake, in search of sawfish, I took some comfort in remembering that story as I spent days clambering in and out of scorching hot metal canoes, wading unsteadily through river channels, sloshing through mud and listening to the roar of mosquitos outside my tent as I slept on the hard ground just beyond the lakeshore. Only, unlike Holmes, who despite the rough conditions 'was thin and worn, but clear and alert, his keen face bronzed by the sun and roughened by the wind. ....his linen as perfect as if he were in Baker Street', I ended my trip a rumpled, muddy, sunburned and dangerously dehydrated heap. Certainly, I am not the most stylish of detectives. 

 

Left: Dapper detective Sherlock Holmes in his tweeds, collecting evidence on Dartmoor. Right: One not-so-dapper sawfish researcher, crossing the mangroves of Ankasomborona in northern Madagascar.

The search for sawfishes is at times intriguing and exciting - visiting remote coastlines and riverbanks, taking part in traditional ceremonies of fishing communities, meeting fishers who have recently caught a sawfish. But travelling alone for months at a time can be a lonely and frustrating task, too. As Watson observes of Sherlock Holmes' camp on Dartmoor:

'he must be of Spartan habits and cared little for the comforts of life. When I thought of the heavy rains and looked at the gaping roof I understood how strong and immutable must be the purpose which had kept him in that inhospitable abode'. 

But then, if the protection of the most endangered family of sharks and rays on the planet does not ignite a strong sense of purpose, what would? 

Of course, my work is in some ways vastly different from the investigation of crimes. No one person is to blame for the demise of sawfishes, and we may never know the reasons why some populations have disappeared. What's more, in some places, we still have a chance to prevent the crime - to halt the decline before another sawfish population disappears. But the speed and efficiency of Sherlock Holmes' investigations is essential, because for these critically endangered seamonsters, we are truly racing the clock. 

'Data! Data! Data!' he cried impatiently. 'I can't make bricks without clay!'

- Sherlock Holmes, The Adventure of the Copper Beeches. 

        1. From The Moonstone (1868) by Wilkie Collins. Tinsley Brothers, London.
2. The Suspicions of Mr. Whicher or The Murder at Road Hill House (2008) by Kate Summerscale. Bloomsbury, London. 
3. The Hound of the Baskervilles (1901) by Arthur Conan Doyle. The Strand Magazine, London. 

Black and white sawfish image copyright of the Florida Center for Instructional Technology. Magnifying glass image from cliparts.co.