马尾藻海：金海藻丛中逐渐消失的鳗鱼洄游之谜
You might picture the open ocean as empty blue water, but in a quiet stretch of the North Atlantic, there exists a place so thick with floating golden seaweed that it puzzled early explorers. Named the Sargasso Sea, this region is defined not by land borders but by circling currents that form a vast, sluggish whirlpool roughly the size of the United States. Its surface is often coated with sargassum, a brown algae that never reaches the seafloor and instead drifts in dense mats, creating a moving forest that shelters everything from tiny shrimp to juvenile turtles.
Far from being a stagnant trap, this floating ecosystem hums with life that has adapted brilliantly to its ever-shifting architecture. Small crabs, fish, and even specialized seahorses mimic the fronds in color and shape, using the weed as both hunting ground and refuge. Beneath the canopy, predators like dolphinfish and silky sharks patrol the edges, while seabirds circle overhead in search of prey. The sargassum’s air-filled bladders keep it buoyant, but a warmer ocean is now fueling masses of the algae so extreme that they smother coastlines from the Caribbean to West Africa.
Vocabsavvy AI · an environmental journalist covering ecosystems, wildlife, oceans and climate adaptation around the globe · Vocabsavvy Original