"Things You Wouldn't Know If We Didn't Blog Intermittently."
23 February 2009
A fish with a transparent head
Macropinna macrostoma (common name "barreleyes) can rotate its eyes to a vertical position; because its head is transparent, it can then look through its head to see predators or prey above itself without moving its body. The transparent head also protects the delicate eyes from the stinging cells of siphonophores, which probably are the primary prey for this fish.