Using dual-frequency sonar to detect juvenile goliath Grouper

U.S. Military sonar technology finds critically endangered juvenile Goliath grouper tucked away in mangrove nurseries in Florida.

Ecology & Science

The Ocean Research & Conservation Association (ORCA) and its collaborators announced today the world’s first use of an acoustic underwater camera to survey juveniles of goliath grouper in mangrove habitats.

Spookfish has mirrors for eyes

The brownsnout spookfish, which lives at a depth of more than 3,000ft, has been identified as the only vertebrate ever found to use mirrors, rather than lenses, to focus light in its eyes. The mirrors give the fish the edge over its predators because they allow it to detect flashes of light made by creatures in the deep in more detail than eyes with lenses can.

Ecology & Science

"In nearly 500 million years of vertebrate evolution, and many thousands of vertebrate species living and dead, this is the only one known to have solved the fundamental optical problem faced by all eyes - how to make an image - using a mirror," said Professor Julian Partridge, of Bristol University. 

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