The ocean, a vast and mysterious realm, holds secrets that often remain hidden in the depths. But photographer Jialing Cai has found a way to bring these secrets to the surface, quite literally. Her unique approach to blackwater diving has revealed a world that is both captivating and intriguing.
The Blackwater Dive: A Journey into the Unknown
Imagine plunging into the ocean at night, where the floor is invisible, and you're floating in an endless void. This is the world of blackwater diving, as described by Cai. It's a world where your sense of location is lost, and the excitement of the unknown can overwhelm any fear.
During her first nighttime dive, Cai discovered a thriving ecosystem. Baby octopuses, jellyfish, crabs, and a myriad of copepods, often referred to as the 'insects of the sea,' revealed themselves in this black 'empty space.' It's a reminder that life thrives even in the most seemingly desolate places.
Capturing the Unseen
What's remarkable about Cai's work is that she doesn't need to venture deep into the ocean to capture these creatures. Instead, she waits for them to come to her. Every night, in what is the largest mass migration of animals on Earth, these deep ocean creatures rise to the surface to feed. Cai simply throws herself into the open ocean, and the deep sea comes to her.
"I just have to throw myself out into the open ocean at night, and the deep sea will come to me," she says, capturing the essence of her unique approach.
Revealing the Unseen Lives
Traditionally, our understanding of mid-water ocean life has been limited. Specimens are often collected in nets, removed from their natural habitat, and preserved in jars, offering a lifeless glimpse of their intricate structures. But Cai's photographs provide a stunning revelation.
"Having photographic evidence of these animals is important because they're rarely seen in their natural habitat," says Jon Copley, a professor of ocean exploration. Cai's images offer a glimpse into the daily lives of these creatures, showcasing their beauty and complexity.
A World of Surprises
Cai's first blackwater dive, at just 19 years old, led to a remarkable encounter with a wunderpus octopus. As an adult, this octopus would have zebra-like stripes, but in its juvenile stage, its colour cells are yet to develop, allowing it to blend seamlessly into the dark void. Cai's image, captured with three bright lights, also attracted a diverse range of zooplankton, creating a festival-like atmosphere.
But this dive also had its moments of danger. Cai, in her pursuit of the perfect shot, swam away from the dive boat and her guide, finding herself alone in the darkness. It's a reminder of the risks involved in such ventures and the importance of safety in exploration.
The Magic of Diel Vertical Migration
Cai's journey into the world of blackwater diving was inspired by the phenomenon of diel vertical migration (DVM). Every night, trillions of tiny zooplankton migrate from the deep sea to feed in the relative safety of darkness. This nightly migration creates an 'evening chorus,' a hum of activity as fish, shrimp, jellies, and squid make their way to the surface.
"I realised I could take glimpses into a world that my mortal body would never allow me to reach," Cai reflects. Her words capture the essence of her passion—a desire to explore the unknown, to witness the unseen, and to share these glimpses with the world.
A Fascinating Food Chain
The diel vertical migration crew is a diverse one, with predators and prey jostling for survival. Many of these animals have developed ingenious defense strategies. For instance, a juvenile fish in Cai's images is seen utilizing the venomous tentacles of a jellyfish as a chemical shield, a clever tactic to avoid being eaten.
"These little critters form the basis of the food chain, so they're really important for everything from fish to whales," explains Laura Hobbs, a lecturer in Arctic marine science. Cai's images offer a unique insight into this complex web of life.
The Impact of Human Activity
The twilight zone, a vast layer of the ocean stretching from 200 to 1,000 meters deep, is home to the majority of marine life. It's a critical part of ocean ecosystems and the global carbon cycle. However, human activity, including fishing and climate change, poses a significant threat to this delicate balance.
"Predictions are that the abundance of life there will decline," Copley warns. Cai's images, therefore, serve as a powerful reminder of the beauty and fragility of our oceans, and the need for conservation and sustainable practices.
A Journey of Discovery
Jialing Cai's work is a testament to the power of exploration and the human spirit. Her photographs not only reveal the beauty of the deep sea but also the intricate relationships and strategies that govern life in the ocean. It's a journey of discovery, where every dive brings new surprises and insights.
As Cai puts it, "I just have to throw myself out into the open ocean at night, and the deep sea will come to me." It's a bold statement, a declaration of her passion and dedication to uncovering the secrets of the deep.
