MBARI researchers Bruce Robison and Kim Reisenbichler used video taken by unmanned, undersea robots called remotely operated vehicles (ROVs) to study barreleye fish in the deep waters just offshore of Central California. At depths of 600 to 800 meters (2,000 to 2,600 feet) below the surface, the ROV cameras typically showed these fish hanging motionless in the water, their eyes glowing a vivid green in the ROV's bright lights. The ROV video also revealed a previously undescribed feature of these fish--its eyes are surrounded by a transparent, fluid-filled shield that covers the top of the fish's head.
This video is narrated by senior scientist Bruce Robison.
Barreleyes, also known as spookfish are small, deep-sea, odd-looking fish. To better serve their vision, barreleyes have transparent to translucent heads; this presumably allows the eyes to collect even more incident light.
Just imagine you’re diving and see some kind of a fish with a transparent head. You’ll never dive again!
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