Bruce Thomson / Tuatara (Sphenodon punctatus) portrait, the only surviving species of an order that flourished 200 million years ago, The Brothers Islands, Cook Straits, South Island, New Zealand.

Alex Mustard / Oceanic whitetip shark (Carcharhinus longimanus) with a yellow rubber hoop stuck around its neck (a diver's regulator holder), accompanied by Pilotfish (Naucrates ductor). This shark was photographed...