Ufuo unaowaka bluu usiku

Fuo fulani huwaka gizani. Si kutoka taa, wala si kutoka mwezi. Maji yenyewe huwaka, bluu ya umeme, kila wimbi linapovunjika ufukoni. Ukitembea kando ya ufuo, hata nyayo zako mwenyewe huwaka bluu nyuma yako. Mtaje rafiki ambaye ungemvuta kitandani usiku wa manane ili aone jambo hili.

Some beaches glow in the dark. Not from lamps, not from the moon. The water itself lights up, electric blue, every time a wave breaks on the sand. Walk along the edge and your own footprints flash blue behind you. Tag the friend you would drag out of bed at midnight to see this.

Mwanga huo hutoka kwa viumbe wadogo sana wa baharini, wengi mno kiasi cha kutoonekana mmoja mmoja. Maji yanapotikiswa karibu nao, miili yao hutoa muwako wa haraka wa bluu, kama kimulimuli cha baharini. Wanasayansi huuita mwanga hai. Wimbi moja linalovunjika hutikisa mamilioni yao kwa wakati mmoja, na wimbi lote huwaka bluu kwa dakika chache.

The light comes from billions of tiny sea creatures, far too small to see one by one. When the water around them moves, their bodies make a quick flash of blue light, a bit like a firefly of the sea. Scientists call this living light. A breaking wave shakes millions of them at once, and the whole wave burns blue for a moment.

Kwa nini hufanya hivyo? Muwako huo ni aina ya kengele ya hatari. Mwindaji mdogo anapoogelea kati yao na maji yakianza kuwaka, wawindaji wakubwa zaidi ghafla huona chakula kilipo. Kwa hiyo viumbe hao wadogo huwasha bahari ili kuita msaada hatari. Kwao ni jambo la kuishi. Kwa mtu yeyote aliyesimama ufukoni usiku wa manane, inaonekana kama bahari imejaa nyota zilizoanguka.

Why do they do it? The flash is a kind of alarm. When a small hunter swims through them and the water starts to glow, bigger hunters can suddenly see where dinner is. So the little creatures light up the sea to call for dangerous help. For them it is survival. For anyone standing on the beach at midnight, it looks like the ocean is full of fallen stars.