One day, after it had been off some hours, it returned in company with three yellowtails, a sort of cousin to the dolphin. This little school kept together, except when in danger and when foraging about the sea. Their lives were often threatened by hungry sharks that came round the vessel, and more than once they had narrow escapes. Their mode of escape interested me greatly, and I passed hours watching them. They would dart away, each in a different direction, so that the wolf of the sea, the shark, pursuing one, would be led away from the others; then after a while they would all return and
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