Don’t call the Portuguese Man o’ War a jellyfish. And don’t get near its stinging tentacles, even if it’s dead. I was splashing around in the waves of the Gulf coast when I saw it – a translucent bluish blob floating on the surface of the water. “Is that a jellyfish?!” I yelped. “Yeah,” my

It’s a sheep! It’s a cow! No, it’s Costasiella kuroshimae (or ‘Leaf Sheep’ for short). This adorable little sea slug, whose beady eyes and cute feelers make it look like a cartoon sheep, feeds on algae – just like the real thing! What’s fascinating about the tiny ‘leaf sheep,’ which can grow up to

Sea slugs aren’t exactly creatures you’d consider to be adorable, but Japan’s Twittersphere has just rediscovered what is probably the cutest sea slug ever – Jorunna parva, a sea slug that looks like a fluffy bunny. This tiny sea slug’s bunny ears are actuallyrhinophores, or chemosensory

For me one of the most wondrous parts of any dive is the moment that the water engulfs my mask as my head slips below the surface. I think it’s the suspense of the unknown of what lies beneath, the transitional part of moving from one element to the next that feels so magical and the thought of

Tens of thousands of giant jellyfish are swarming off one of Britain's most popular stretch of coastline this Bank Holiday. Record numbers of the 5ft long monsters - which weigh five stone each - were spotted off the Dorset coast. The unprecedented invasion of barrel jellyfish may due to over