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Think fast as a Squid

Squids, octopus and cuttlefish (who all belong to the phylum of molluscs) are among the most intelligent animals in the sea, and definitely the most intelligent marine invertebrates. We should in fact ask ourselves if the human mind is capable of thinking as fast as these creatures do.

Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines
Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines

Sea urchins see with their whole body

According to a study that appeared in the Journal Proceedings of the National Academy of Sciences, new research has indicated that sea urchins may use the entire surfaces of their bodies—from the ends of their "feet" to the tips of their spines—as huge eyes. Scientists have long known that marine invertebrates react to light without any obvious eye-like structures, raising the question of how the animals see.

Do's and Don't's of Responsible Shark Diving

Divers with lemon sharks. Photo by Andy Murch
Divers with lemon sharks. Photo by Andy Murch

Maybe the concept of ‘responsible shark diving’ sounds a little oxymoronic, but there are many things that you can do to protect yourself and the sharks during your interaction. First and foremost, I can’t stress enough the need to gain as much knowledge as possible about the animals and their environment. To go into the water without at least a basic idea of how the sharks are likely to react is foolhardy to say the least.

Michael Menduno - the man who coined the phrase 'Technical Diving' and founded aquaCORPS magazine

So, what is AquaCorps?

Jump back to the summer of 1996 and British Cave Diver Mike Thomas presents me with a copy of aquaCORPS magazine, (and I still have this issue in my office today). It was a defining moment in my diving career. Mike had taken me under his wing, showing me there was more than 30 metre, single tank, recreational, air diving. The aquaCORPS issue was N11, October / November 1995 and I vividly remember being thrilled to learn of a brave new world of diving.

Basilosaurus, one of the most common of the primitive whales lived 35 to 40 million years ago
Basilosaurus, one of the most common of the primitive whales lived 35 to 40 million years ago. Note: rendition's accuracy is disputed because it would probably not have had exposed teeth like that.

Prehistoric whales got bent

A team of paleobiologists surveyed hundreds of modern and ancient whale skeletons for decompression syndrome, which occurs when quick pressure changes force air or fat bubbles out of blood vessels.

Such damage would have been common when whales first began plunging into the depths of the ocean, says Brian Beatty, of New York College of Osteopathic Medicine in Old Westbury, US, who led the study.