Pete Oxford / Demon Fish / Eartheater (Satanoperca leucosticta) amongst aquatic vegetation in permanant freshwater pond, savannah, Rupununi, Guyana

Pete Oxford / Demon Fish (Satanoperca leucosticta) in aquatic vegetation, Rupununi, Guyana

Sue Daly / Demon stinger / Bearded ghoul fish (Inimicus didactylus) on seabed, Lembeh Straits, Sulawesi, Indonesia

Patricio Robles Gil / Stone statue of Hindu goddess Durga killing a demon, Mahisasur, Bhaktapur, Kathmandu, Nepal, December 2007

Fred Bavendam / Demon Stinger (Inimicus caledonicus) caught in derelict fishing net, an example of ghost fishing, Lembeh Strait, Indonesia

Bernard Castelein / Nepalese monk with face mask, dressed as Demon (to reprasent evil) at the end of the 'Duk chu' festival, Lo-Manthang, Upper Mustang, Nepal

Bernard Castelein / Close-up of Nepalese monk wearing face mask, dressed as a Demon, during 'Duk chu' festival, Lo-Manthang, Upper Mustang, Nepal

Bernard Castelein / Close-up of Nepalese monk with mask, dressed as a Demon during 'Duk chu' festival, Lo-Manthang, Upper Mustang, Nepal

Juergen Freund / Bearded ghoul fish / Demon stinger displays pectoral fins when threatened {Inimicus didactylus} Indo-Pacific

Paul D Stewart / Woodcut illustration of the 'Monster of Krakow' was reported widely in the mid sixteenth century as a real occurence. It was seen by many protestants as a monstrous symptom of divine displeasure at th...

Paul D Stewart / Woodcut illustration of Satyrus marinus - a sea monster or mermaid of partially human form, with old colouring. Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. Gesner reproduced thi...