PLoS ONE (Jan 2013)

Spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus).

  • Tadamichi Morisaka,
  • Mai Sakai,
  • Kazunobu Kogi,
  • Akane Nakasuji,
  • Kasumi Sakakibara,
  • Yuria Kasanuki,
  • Motoi Yoshioka

DOI
https://doi.org/10.1371/journal.pone.0072879
Journal volume & issue
Vol. 8, no. 8
p. e72879

Abstract

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Spontaneous ejaculation, which is defined as the release of seminal fluids without apparent sexual stimulation, has been documented in boreoeutherian mammals. Here we report spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus), and present a video of this rare behavior. This is the first report of spontaneous ejaculation by an aquatic mammal, and the first video of this behavior in animals to be published in a scientific journal.