The secret lives of orange roughy

Acoustic echogram from the moored echosounder on Morgue, showing the diving response of fish when lights came on at 18:00 NZST on 17 July. Inset shows frame grab from top camera showing orange roughy at 990m depth. Credit: NIWA, Peter Marriott

Moored underwater cameras have exposed the secret lives of orange roughy nearly 900m below the ocean surface.

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