The Nightfish is an Australian picture book written and illustrated by Helen McCosker. Published in 2006, this children’s story makes a good counterpoint to There’s A Sea In My Bedroom (1984). In Margaret Wild’s 1984 story, a boy takes a shell home with him from the beach and — as a child of the eighties I can tell you — no one thought twice about taking souvenirs from nature. Our current generation of children are more environmentally aware. Now they have at least bumped up against the idea of ‘Take nothing but photos, leave nothing but footprints’. This change of societal attitude is reflected in their picture books: If you take something from nature you must return it, otherwise you’ll upset the environmental balance and all hell will break loose.