"Aerial Urination"
Snotnose writes:
According to Popular Science some dolphins have an unusual way to attract a mate.
Researchers say they have made a startling discovery in the Amazon River. But their evidence wasn't collected from the water-it could be seen from shore. After around 219 hours of observations, they can confirm that male Amazon river dolphins (Inia geoffrensis), also known as botos, often roll onto their backs and urinate over three feet into the air. It isn't random. The male botos appear to be peeing with a purpose.
"Aerial urination starts with a boto slowly positioning itself upside down, exposing its penis above water, and ejecting a stream of urine into the air," the team explained in their study.
[...] Urine is a common communication tool used by many terrestrial animals such as dogs, bears, and cats. It's seen far less frequently in aquatic environments, but Araujo-Wan and their colleagues offered a few examples in their study. Dominant male African cichlid fish (Astatotilapia burtoni) interpret urine pulses for both reproductive and territorial information. The narrow-clawed crayfish (Astacus leptodactylus), meanwhile, urinates as a sign of aggression. In both of these cases, however, it's more about the act of peeing than what is actually in the pee itself.
Not looking forward to teenage boys in the pool this summer.
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