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Home Environment Animals

Young Hawaiian seals are showing up with eels stuck in their noses — and we’re not really sure why

Sure you've had bad days, but have you had an 'eel up your nose' day?

Mihai Andrei by Mihai Andrei
December 7, 2018
in Animals, Offbeat

Researchers have been monitoring Hawaiian monk seals for 40 years, but up until a couple of years ago, they had never seen this behavior — and since then it’s apparently become even more popular.

A juvenile Hawaiian monk seal found with a spotted eel in its nose at French Frigate Shoals in the Northwestern Hawaiian Islands this past summer (Photo: NOAA Fisheries/Brittany Dolan).

The strange situation started a few years ago when Charles Littnan, lead scientist of the monk seal program, received an unusual email. The subject was short, but telling: “Eel in nose.” After a few exchanged emails and phone calls, Littnan realized that there was, indeed, a seal with an eel up its nose, and they weren’t really sure what to do about it.

While the eel was no longer living, the seal didn’t really seem too bothered about the situation.

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Eventually, the decision was made to remove the eel from its nose. After half a minute of pulling, a two-and-a-half-foot eel was removed from the seal’s nostril. The researchers chalked it up to be a bizarre accident and moved on — but then, it kept happening.

Not too many times (only 3 or 4 sightings), but sufficient enough nto rule out an isolated accident. The fact that this was never reported until recently, and that it was only happening to juveniles, was even more puzzling.

“In the nearly 40 years that we have been working to monitor and protect endangered Hawaiian monk seals, we have only started seeing “eels in noses” in the last few years,” NOAA explained in a recent blog post. “Yet, our researchers have observed this phenomenon three or four times now. We don’t know if this is just some strange statistical anomaly or if we will see more eels in seals in the future.”

In all cases, the eels were removed and the seals did just fine — although the same couldn’t be said for the eels — none of them survived. As for an explanation, however, there is none.

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“We have no idea why this is suddenly happening,” Littnan told Washington Post. “You see some very strange things if you watch nature long enough, and this could end up being one of these little oddities and mysteries of our careers that 40 years from now, we’ll be retired and still questioning quite how this happened.”

Several theories have already been ruled out. The islands are remote and visited only by biologists, so it couldn’t be the hand of a malevolent human. The seals’ nostrils also shut when they are diving for food (which can very well be eels), and it’s unlikely that an eel would be tempted to jump into the nose of a seal — even as a last resort defence.

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The other idea scientists were considering was vomiting — like humans sometimes vomit pieces through their nose, the seal may have gulped an eel and then threw it up — but again, it’s unlikely that an  eel would have been pushed through the nasal cavity.

“This may be a case of an eel that was cornered trying to defend itself or escape. Alternatively, the seal could have swallowed the eel and regurgitated it so that the eel came out the wrong way. We might never know,” NOAA adds.

Littman has another idea. It seems that through their very nature, monk seals get into “troublesome situations,” and juvenile seals may not be all that different from human teenagers. Basically, it may be a “teenage trend” — one seal accidentally got an eel up its nose, and then others started copying it because they thought it was “cool.”

There’s no evidence to truly back this up, but at this point, it’s as good an idea as any.

Although the seals don’t appear to be suffering from this, having an eel up your nose can (obviously) be a significant health hazard, either through infections associated with decomposition or due to the fact that the seal won’t be able to properly shut down its nostril while swimming.

 

Mihai Andrei

Mihai Andrei

Andrei's background is in geophysics, and he's been fascinated by it ever since he was a child. Feeling that there is a gap between scientists and the general audience, he started ZME Science -- and the results are what you see today.

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