The three oceans that surround New Zealand are home to a vast array of exotic marine life, including the Yaldwyn's triplefin ( Notoclinops yaldwyni) show above, resting on pink sponge. Underwater Wonders of New Zealand by Gillian and Darryl Torckler (New Holland, £19.99, $32.95) is a lavishly illustrated guide to this underworld.