The Voyage of the Arctic Tern instructs his three friends remain with the Arctic Tern. Then he dons his scuba gear, plunges into the water, and swims toward the ship. A large octopus with fiery eyes guards the treasure chest on the deck. Bruno wrestles with the octopus, kills it, and touches the silver coins in the chest. Immediately, Morgan's pirate ship crumbles to dust. Then Bruno, the treasure chest, and the Arctic Tern vanish. Chris, Steve, and Adrian no longer remember how they each got safely home after this, nor can they remember anything about Bruno, the Arctic Tern, or the treasure. However, Adrian remains
Sandwich tern and its underparts white, and this tern looks very pale in flight, although the primary flight feathers darken during the summer. The lesser crested tern and elegant tern differ in having all-orange bills; lesser crested also differs in having a grey rump and marginally stouter bill, and elegant in having a slightly longer, slenderer bill. Chinese crested tern is the most similar to Sandwich, but has a reversal of the bill colour, yellow with a black tip; it does not overlap in range with Sandwich tern so confusion is unlikely. In winter, the adult Sandwich tern's forehead becomes white. Juvenile