Navigating the Unknown

  Sri Lanka is home to a remarkable diversity of marine mammals, with around 27–28 species of whales and dolphins recorded in its waters, alongside the rare dugong. Among them, dolphins hold a special place as both ecological treasures and charismatic ambassadors for marine conservation. Their presence has not only enriched the island’s biodiversity but also created opportunities for ecotourism, with destinations such as Kalpitiya and Mirissa. Yet, despite their popularity, dolphins in Sri Lanka face serious conservation challenges. One of the most critical threats comes from bycatch in gillnet fisheries, particularly those targeting tuna. Thousands of dolphins are accidentally killed each year after becoming entangled in synthetic fibre gill-nets. Unregulated dolphin-watching tourism presents another growing concern. While the industry has generated income for local communities, the lack of consistent guidelines for boat operators has raised fears of stress and behavioral disturba...

Imagine a natural wall standing between your home and the ocean. This is what mangroves do every day. Mangroves are not just trees between land and sea. They are coastal warriors that protect our shores, fisheries, and climate. In Sri Lanka and across the tropics, these ecosystems are lifelines for both people and nature. Their roots act like a natural wall, slowing waves and holding the coastline in place. During storms and tsunamis, mangroves reduce flooding and protect coastal villages. Their roots also provide nurseries for crabs, shrimp, and young fish, making mangroves the foundation of healthy coastal fisheries. Mangroves are also climate heroes. They store huge amounts of carbon, much more than most land forests. By keeping this “blue carbon” locked away, they help slow global warming while giving us cleaner air and water. But mangroves are disappearing due to shrimp farming, development, and pollution. Each loss weakens our coasts and destroys vital habitats. Protecting and re...

Our oceans have billions and billions of plants and animals, but marine pollution is endangering them. Sixty million tons of waste like plastic, oil, chemicals, and sewage are poured into the ocean annually. Among them plastics have been a great concern for marine eco system.  Plastic comes in different types of shapes and size. Those which have the size less than 5 mm in size are known as microplastics. Due to their small size, microplastics can be easily ingested by marine organisms, entering the food chain and potentially threatening marine ecosystems and human health.  The production and release of vast amounts of plastic into marine ecosystems is now being recognized as a key potential threat to environmental stability. They enter the ocean through various pathways, often due to human activities and environmental processes. These tiny particles affect marine organisms at various levels, from microscopic plankton to large marine mammals, disrupting ecosystems and food chai...

  When you hear the word "shark," what comes to mind? Probably a terrifying predator with sharp teeth, lurking in the depths, ready to pounce at any moment, right? Thanks to Hollywood movies like Jaws, that’s how most of us think of sharks. But what if I told you that sharks are not the villains we’ve been led to believe? In fact, they are the guardians of the ocean an essential part of the delicate balance that keeps our marine ecosystems thriving. Let’s dive in and explore why these misunderstood creatures are more like protectors of the ocean than fearsome predators. Ancient Sentinels of the Sea Sharks have been around for over 400 million years that’s even before dinosaurs roamed the Earth! Despite their ancient history, sharks are still some of the most efficient and skillful predators in the ocean. But their role isn’t just about hunting.   As apex predators (meaning they’re at the top of the food chain), sharks help keep everything in check. Think of them as the ocean’...

       Seabirds are not just stunning flyers above the ocean, they are powerful indicators of ocean health. These birds spend most of their lives out at sea, flying over vast distances, diving for fish, and nesting on remote islands. From the mighty albatross to the quick little tern, each seabird is deeply connected to the marine world.      Their lives reflect the state of our oceans. When fish stocks fall or ocean temperatures change, seabirds are among the first to respond. Scientists study their migration, feeding, and breeding patterns to understand how the ocean is changing, making seabirds true messengers of the sea.      Unfortunately, seabirds also face growing threats. Many species accidentally eat plastic floating on the water, mistaking it for food. Others get caught in fishing gear or lose their nesting grounds due to rising sea levels. These dangers not only affect the birds but also warn us of the greater damage happening...

Hydrography, the science of measuring and describing the physical features of oceans, seas, and coastal areas, plays a crucial role in marine science. It provides the foundational data needed to understand the seafloor, monitor oceanographic processes, and support safe navigation. Hydrographic surveys use advanced technologies like echo sounders, sonar systems, GPS, and satellite imagery to map seafloor topography and water depth. This data is vital for producing nautical charts, which guide ships and submarines safely through complex marine environments. Accurate hydrographic data also helps identify hazards like submerged rocks, shipwrecks, and shallow areas. Beyond navigation, hydrography contributes to marine conservation, climate studies, and resource management. It supports research on sea level rise, coastal erosion, and marine habitats. Hydrographic mapping also aids in locating sites for offshore energy projects and underwater cables. In essence, hydrography acts as the bluepr...