When seasons change, the sea changes too. Jeju Island is not just a beautiful place for sightseeing. It’s also a unique underwater world full of life. Here, you can find the world’s largest soft coral gardens, warm waters from the Kuroshio Current, and lava-made underwater landscapes. Every season brings new marine life. Let’s dive into what makes Jeju so special.
Jeju is a volcanic island, made by lava from old eruptions. Under the water, you can see tall lava rocks, cracks, and walls. These create a 3D underwater playground — not flat and boring. Also, the basalt rocks (lava rocks) have many tiny holes and spaces. Baby fish and small sea creatures hide there to stay safe from big predators. That’s why Jeju’s sea has so much marine life — it’s a great place for animals to grow and live.
The sea around Jeju has a huge soft coral forest. It’s even protected as a Natural Monument in Korea. These corals come in many colors and grow on rocks, becoming a home for many fish and creatures. It’s colorful, peaceful, and full of life.
Jeju is also great for macro diving – looking at tiny sea creatures up close. You can find nudibranchs (colorful sea slugs), baby shrimp, and small fish hiding between the corals. Photographers love Jeju because there’s always something small and special to discover.
Jeju’s sea is warmed by the Kuroshio Current, so the water stays warm most of the year. Because of this, both temperate and tropical fish live together in Jeju.
Unlike tropical seas (which don’t change much), Jeju’s sea changes with the seasons. Tropical and subtropical fish live here, but the mix of fish changes in spring, summer, fall, and winter. That means you can visit the same spot in different seasons and always see something new.
Most dive spots in Jeju are near small islands like Munseom (문섬), Beomseom(범섬), and Seopseom(섶섬). So, you’ll go diving from a boat. There are dive spots for all levels — from beginner to advanced. As soon as you jump from the boat into the sea, it feels like you’re entering another world. You can try macro diving, drift diving, wall diving, and more — depending on what you like.
Diving in Jeju is not just a hobby. It’s an adventure. Every day is different — the sea, the animals, the feeling. That’s why so many people fall in love with Jeju and come back again and again. 📍 Come dive in Jeju with us. You’ll discover a side of the ocean you’ve never seen before.
