Reef Threads Podcast #278


It’s always a treat when Alex Rose joins us to share her underwater exploits. This time she takes us from Orca hunting in Norway to the Philippines, and then to Australia. Don’t miss the stories this week and be sure to check out her photos below. Download the podcast here, or subscribe to our podcasts at iTunes. Also, follow us on Twitter at reefthreads.—Gary and Christine

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Large male orca in Tromso, Norway

The Northern Lights

Pair of commensal shrimp on a whip coral.

Tomato clownfish showing off.

Reefscape with lots of anthias.

Pair of Coleman shrimp on a fire urchin.

Great Barrier Reef at low tide.

Most of the carpet anemones were bleached on the Great Barrier Reef.

Health outcropping of Acropora on the Great Barrier Reef.

Bleached Acropora at around 60 ft. on the Great Barrier Reef.

Great Barrier Reef hit by Widespread Coral Bleaching

Australia’s Great Barrier Reef has been hit by widespread coral bleaching, which has the potential to be devastating to one of the world’s most iconic natural wonders. Battered by record warming on land and sea the past two years, coral reefs around the world have suffered bleaching events. When that happens, corals expel the symbiotic algae living in their tissues, causing corals to turn white or pale. Without the algae, the coral loses its major source of food and is more susceptible to disease. Starting in the North Pacific Ocean in the summer 2014, the bleaching expanded to the South Pacific Ocean, Indian Ocean, and Atlantic Ocean in 2015. That prompted NOAA’s Coral Reef Watch in October to declare the third ever global bleaching event – after the 1997-1999
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