The cove is small enough that you can swim its perimeter in twenty minutes, but you'll want to spend longer. Underwater, the volcanic rocks create caverns and overhangs where fish congregate in numbers that seem impossible for such a compact space. Sergeant majors school in the shallows, their yellow and black stripes vivid even in the filtered light. Farther out, where the rocks drop into darker water, larger fish patrol the boundary between cove and open sea.
“The volcanic rock formations create a natural breakwater that keeps the interior cove calm even when offshore swells reach two meters.”
Credit: UnsplashTropical island lagoon from above
You enter the water from a narrow strip of coarse sand mixed with pebbles that have been tumbled smooth by decades of wave action. The bottom is rocky for the first few meters—reef shoes help—but once you're past the entry zone, the terrain becomes fascinating rather than treacherous. Crevices shelter crabs and small octopi. Anemones retract when your shadow passes. The water temperature stratifies, cold layers mixing with warmer ones as you swim through invisible boundaries.
A handful of local snorkelers consider Ajiro their secret, arriving early before the sun heats the rocks and the afternoon wind chops the surface. They know which tides bring the best visibility and where the biggest fish feed. If you ask respectfully, they might point out the channel where the water flows deepest, where you can float and watch the seafloor eight meters below, sharp and clear as aquarium glass.
