Barrel jellyfish: it weighs 20 kilograms

A 20-kilogram barrel jellyfish has had a close encounter with an environmentalist and his surf dog, in the Percuil Estuary, in Cornwall, Wales.

Matt Slater, marine conservationist at the Cornwall Wildlife Trust, was swimming in the Percuil Estuary with his dog, when he spotted a large "Rhizostoma pulmo" just a couple of meters underwater.

"These creatures are incredibly beautiful when you get a close look at them. The tentacles really look like soft coral, and round the edge of the jellyfish's umbrella like bell there is a deep blue line punctuated every twenty centimetres or so with a tiny dot, a sensory statocyst," Slater tells the Cornish Guardian.

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Clever Buoy: it detects sharks, not people

A joint-venture formed by Optus, Google and Shark Attack Mitigation Systems has developed smart ocean buoys that detect shark-like objects and send real-time valuable information to lifeguards on the beach.

The Clever Buoy is still a prototype, but the project promises to improve safety for all surfers and beachgoers worldwide. The advanced shark detection technology uses new sonar technology to detect shark-sized objects in coastal waters.

When detection is made by the Clever Buoy, an alert will be sent to relevant audiences using Google+ circles, via the Optus Network. It currently detects a shark-like object of two meters or more in length.

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Duke Kahanamoku Beach: approved by Dr. Beach

The Duke Kahanamoku Beach has been considered the best American beach of 2014 by Dr. Beach.

Coastal expert Dr. Stephen P. Leatherman, professor at Florida International University, has released a list with the Top 10 Beaches for 2014. The highest award goes to Waikiki, in Hawaii.

The Duke Kahanamoku Beach is located at the west end of Waikiki Beach, far from the large crowds elsewhere. It is the widest beach on this stretch of famous sands, and it is protected by an offshore coral reef, making it an excellent beach for families with children.

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