05-20-2023-1506 - Benthopelagic sea cucumbers

Benthopelagic sea cucumbers, such as this Enypniastes, are often confused with jellyfish, have webbed swimming structures enabling them to swim up off the surface of the seafloor and journey as much as 1,000 m (3,300 ft) up the water column

https://en.wikipedia.org/wiki/Sea_cucumber#/media/File:Enypniastes_sp.jpg