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Electron micrograph of Bacteriophages (vira) in the process of infecting a cell. This is not the virus or bacteriophage in question but a generic photo

A vaccine for corals

White syndrome' is a name given to a number of diseases exhibiting similar symptoms, such as such as white pox, white band and white plague disease. The causes of white syndrome are in many cases unknown. White syndrome has increased in abundance 20-fold in the last five years, with increases on inner, mid-shelf and outer-shelf reefs along the length of the Great Barrier Reef. It also had a major impact on Caribbean reefs. In areas of the Great Barrier Reef surveyed, white syndrome, along with skeletal eroding band, was the most common disease.

Deep sea crabs are sensible to blue and ultraviolet light
Deep sea crabs are sensible to blue and ultraviolet light

Deep sea crabs see in colour

Investigating deep waters off Bahamas, US-based researchers recorded the glow of tiny bioluminescent species using a submersible vehicle.

Descending to sites between 600 and 1000m down, the scientists observed flashes of bioluminescence where plankton collided with boulders and corals.

The team also studied how crustaceans react to this light, and found previously unknown sensitivities to blue and ultra violet wavelengths.

Wobbegongs spend most of their time on the sea floor and hunt mostly at night using an unusual sit-and-wait ambush strategy
Wobbegongs spend most of their time on the sea floor and hunt mostly at night using an unusual sit-and-wait ambush strategy

Many sharks are colour blind

The PhD study bt Dr. Susan Theiss showed that the wobbegong visual system contains only a single class of cone photoreceptor. Cone photoreceptors are the retinal cells that are used for vision under bright light conditions, whereas as rod photoreceptors are used in dim light.

These previous studies looked at opsins, which are light-sensitive proteins found in the photoreceptor cells of the retina. Rod opsins are used in low light and produce a black and white image, while cone opsins are used in bright light, and often to see colours.

Papua New Guinea: Tufi, New Ireland & Milne Bay

Is there another country anywhere with so much diversity? The six million inhabitants of this nation of mountains and islands are spread over 463,000km2 of mountainous tropical forests and speak over 800 different languages (12 percent of the world total). Papua New Guinea occupies half of the third largest island in the world as well as 160 other islands and 500 named cays.

Papua New Guinea: Unity in Diversity

I’ve been on the road for 36 hours now, and I’m pretty much on the other side of the world from where I started back in rain drenched England. At last, I’m approaching the final legs of the journey—just a short one-hour flight to go.

Things have gone smoothly so far, I’m thinking, as I wander up to the check-in desk for the last leg of my trip. “The flights full,” the attendant tells me, “You’ll have to wait until tomorrow.

South Georgia

South Georgia is the most well-known of the Falkland Islands, also called Islas Malvinas. It lies nearly at the end of the world in the Southern Atlantic Ocean. To find this place on the map, draw an equilateral triangle with one vertex on Cape Horn and another on the Antarctic Peninsula. The third vertex in the east is our destination.

Diving the Arrow

It’s an unsettled kind of morning on Chedabucto Bay of Canada’s east coast. The sun is shining—it’s really quite pleasant—but there’s a brisk wind blowing from the southwest. What that translates into here in the waters between Cape Breton Island and Nova Scotia is heavy seas. We’re pounding through four to six foot swells in a 25-foot rigid hull inflatable boat.

Are you Scuba fit?

Long after the jet lag and the first day back to work, you slip into your favorite dive T-shirt eager to keep the essence of your most recent underwater experience pulsing through your mind and body. Proudly wearing large print logos across your chest is a way of celebrating your passion for diving and sharing it with the rest of the world.

Exley on Mix

I first spoke with Sheck Exley in the summer of 1991. I had begun publishing aquaCORPS: The Journal for Technical Diving, a year earlier and I was working out of the office at Capt. Billy Dean’s dive shop in Key West, Florida, the first technical diving training center in the United States. “Technical diving”, a term we had just coined to describe this new style of diving, was just in its infancy.