Killer (Paperbacks from Hell)

They were caught in the ultimate trap. They faced the ultimate terror. Five men and one beautiful woman. Marooned on a floating island of arctic ice. Together they had the equipment and skills to fight the freezing cold, the violently savage storms. Then suddenly from the angry seas the jaws of horror opened wide as nature's deadliest creature rose from the depths — a huge killer whale of enormous intelligence, incredible power, indestructible endurance, ravenous for human prey....