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Male humpback dolphins do more than just perform acrobatics to attract a mate - they also offer gifts, according to new research.

Marine biologists working off the northwest coast of Australia have observed a rare mating display in which male dolphins were seen gathering and offering large marine sponges (bọt biển) to females. Scientists have never seen this behaviour in dolphins before, highlighting a previously unknown level of social complexity.

Sexual displays are common throughout the animal kingdom, but displays accompanied by objects, or gifts, are actually quite rare. It's a behaviour often seen in some birds, but in mammals it's practically nonexistent outside of humans. New research published in Scientific Reports shows that another mammal, the Australian humpback dolphin (Sousa sahulensis), also participates in these ornamental mating rituals. But as to whether the female dolphins are actually impressed or persuaded by these behaviours, that remains unanswered.

Tags: sex

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