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WDC team at UN Ocean conference

Give the ocean a chance – our message from the UN Ocean Conference

I'm looking out over the River Tejo in Lisbon, Portugal, reflecting on the astounding resilience...
We need whale poo 📷 WDC NA

Whales are our climate allies – meet the scientists busy proving it

At Whale and Dolphin Conservation, we're working hard to bring whales and the ocean into...
Humpback whale underwater

Climate giants – how whales can help save the world

We know that whales, dolphins and porpoises are amazing beings with complex social and family...
Black Sea common dolphins © Elena Gladilina

The dolphin and porpoise casualties of the war in Ukraine

Rare, threatened subspecies of dolphins and porpoises live in the Black Sea along Ukraine's coast....
Minke whale © Ursula Tscherter - ORES

The whale trappers are back with their cruel experiment

Anyone walking past my window might have heard my groan of disbelief at the news...
Boto © Fernando Trujillo

Meet the legendary pink river dolphins

Botos don't look or live like other dolphins. Flamingo-pink all over with super-skinny snouts and...
Risso's dolphin entangled in fishing line and plastic bags - Andrew Sutton

The ocean is awash with plastic – can we ever clean it up?

You've seen pictures of plastic litter accumulating on beaches or marine wildlife swimming through floating...
Fin whale

Is this the beginning of the end for whaling off Iceland?

I'm feeling cautiously optimistic after Iceland's Fisheries Minister Svandís Svavarsdóttir wrote that there is little...

Well, “eel” be damned …

Finding out more about the behaviour of whales, dolphins and porpoises can be a tricky business but researchers in Denmark have inadvertently discovered a new technique and all by accident.

Scientists studying the oceanic migration behaviour of eels implanted tags that would record both temperature and depth into adult eels released on the Atlantic coasts of France and Ireland. Quite unexpectedly, for three of the tags there was a dramatic rise in temperature from 10°C to 36°C and the depth data recorded showed frequent dives to depths of around 800m, indicating that the tagged eels had been eaten by something with a penchant for eel.

Two of the tags had sufficient data to provide even more information. Between them, they recorded a total of 91 dives to maximum depths of 250-860m lasting 11-12 minutes and with surface intervals of 5-7 minutes. In addition, more than two thirds of the dives included a rapid descent from approximately 500m to 600-700m.

This additional information allowed the scientists to conclude that the eel-eating predator was most likely a deep-diving toothed whale – perhaps a sperm whale or a Cuvier’s beaked whale to name but a few.