The find is a pretty rare one, given how far beneath the surface these hairy little guys live.
Glowing and stunningly beautiful one second, the unique sea-dweller is completely invisible the next, thanks to a complex system of crystal layers.
Measuring an estimated 18 feet long, the creature roamed the earth more than 200 million years ago, and likely looked very much like a modern day crocodile or alligator.
Experts believe that the coloring is due to the crab's diet, or possibly a mutation which caused a lack of normal pigment.
We've profiled some pretty amazing sea creatures here on FEARNET over the years... but a sea creature that's totally sea-through? Now this is a new one!
The bizarre 9-foot long sea creature had the gills, fins and scales of a fish, but the mobile neck, robust ribcage and even shoulders, elbows and wrists of a four-limbed animal such as a crocodile.
Shigenori Goto unexpectedly caught one of the elusive creatures last week, measuring 13-feet long and weighing 350 pounds.
Though incorrectly identified as a jellyfish, the bizarre Portuguese man-of-war is actually a siphonophore, which is essentially the scientific way of saying it's a hybrid mutant.
The well-timed photograph is without question one of the most amazing images snapped all year.
A veteran of the sea who's no stranger to finding giant sea creatures at the end of his line, the fisherman described the catch as looking "like some kind of dinosaur," and says he has never in his life seen anything like it.