This is surely the weirdest sea cucumber in the world!
Pelagothuria natatrix is, as far as anyone knows, the world’s only fully pelagic echinoderm. That means they spend their entire lives swimming through the sea and need never descend to the sea floor.
They live in the deep sea and get around by pulsing their umbrella, much like a jellyfish.
In the middle of the umbrella is their mouth, facing straight upward, and surrounded by oral tentacles that capture food from the water.
The body meanwhile simply dangles beneath.
The entire internet has almost ZERO photos of this thing! Someone needs to start a petition…