It’s not hard to know what’s going on in the head of a Marcopinna microstoma fish, because you can see through it! This fascinating creature is immediately recognizable thanks to its transparent dome and filled with liquid that also gives a glimpse of its eyes.
They are not what you expected. You may think that its the little ball-shaped dots at the end of the fish’s face, but those are actually its nostrils. The real eyes are the brownish tubes inside its head, punctuated by the bright green half-spheres.
First discovered in 1939, photographs of this peculiar fish weren’t captured until 2004, which makes sense given the fact they live in depths of 2,000 to 2,600 feet! Better still, they tend to avoid swimming, usually preferring to float motionlessly in the water as they look for prey (typically smaller fish and jellyfish).