Doug Perrine / Hawaiian monk seal (Neomonachus schauinslandi) young male known as 'Kamilo' with identification number applied using hair bleach, Honaunau, South Kona, Hawaii, USA. Critically Endangered species.

Juergen Freund / Bleaching corals and fish shoals, Papua New Guinea.

Adrian Davies / Bleach cup fungus (Disciotis venosa) growing on wood chips in woodland. Surrey, England.

Nigel Cattlin / Sheath blight, (Rhizoctonia solani) disease infected paddy Rice (Oryza sativa) crop, Luzon, Philippines

Nigel Cattlin / Sheath blight (Thanatephorus cucumeris) infection on Rice (Oryza sativa) plants, Philippines.

Nigel Cattlin / Sheath blight (Rhizoctonia solani) bleached lesions on leaves of diseased flattened Rice (Oryza sativa) crop, Luzon, Philippines

Nigel Cattlin / Sheath blight (Rhizoctonia solani) diseased bleached lesions on grains on a Rice (Oryza sativa) ear, Luzon, Philippines

Nigel Cattlin / Sheath blight (Rhizoctonia solani) disease bleached lesions on leaves and stems of Rice (Oryza sativa), Luzon, Philippines

Suzi Eszterhas / Tasmanian Devil (Sarcophilus harrisii) conservationist, Wade Anthony, and researcher marking devil with bleach for identification before they are returned to the wild, Devils at Cradle, Cradle Mountai...