Clearly, the coolest fish in the sea

With its clear head and large green eyes, the Barreleye looks like an alien with a glass bulb on its head out of a sci-fi film…why does a fish need a transparent head?

EXTREME FISHES: Fish can live there?

Fish live in almost every aquatic ecosystem on the planet. But, in some of the places that fish live – dry deserts, extraordinary pressure, absolute darkness, below-freezing temperatures, and harsh acidity – it’s hard to imagine that anything can survive.