OceanDeep Sea
The barreleye fish has a transparent dome for a forehead.
Its tubular eyes sit inside the head and rotate to look up through it, or forward when it moves in to feed.
Source
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More ocean facts
Ocean facts from a place we have mapped less thoroughly than Mars. A male anglerfish merges with his mate for good, there are lakes at the bottom of the ocean, and below about 8,400 metres there are no fish at all. Each fact links to its source.
- A male anglerfish merges with his mate. Permanently.
- There are lakes at the bottom of the ocean.
- The giant squid has the largest eye of any animal.
- There are seafloor springs at 400°C that do not boil.
- Below 8,400 metres, there are no fish. There can't be.
- A dead whale feeds the seafloor for fifty years.