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A Remotely Operated Vehicle (ROV) deployed by Australian scientists under the sea ice at O’Brien Bay, near Casey research station in East Antarctica has recorded a rare glimpse beneath the Antarctic sea ice, revealing an habitat that is productive, colourful, dynamic and full of a wide variety of biodiversity, including sponges, sea spiders, urchins, sea cucumbers,sea stars and coralline encrusting algae.

The footage was captured while scientists retrieved a pH data logger, which has been recording the acidity, oxygen, salinity and temperature of the seawater on an hourly basis since November last year. Designed to determine the impacts of ocean acidification on Southern Ocean sea-floor communities under increasing carbon dioxide emissions.

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Giant squids might be even bigger than we realized

According to research from Charles Paxton, fisheries ecologist and statistician at Scotland’s University of St. Andrews, published in the Journal of Zoology this month, the giant squid could grow to reach as much as 65 feet. But even that is a “conservative analysis,” as size could protect against their #1 predator.

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When the cardinalfish eats what it thinks will be dinner, the tiny ostracod (a type of marine crustacean) emits a burst of light. That burst saves the ostracod’s life by getting it spat out.  Not all ostracods are bioluminescent, and these cardinalfish can’t tell which ones will do so before eating them.