Amazing Stories v14n09 (September 1940)

“Frank R. Paul's Neptunians--unlike his highly advanced Jovians and Ioians--are simple, seal-like "lizard-fish creatures" evolved to live in Neptune's viscous seas. Suction cups on the creature's belly enable it to "anchor itself to underwater formations, and thus free its arms and legs for tearing the tough mossy growths which must form its food." It's also noted that the Neptunian would "smell fishy." Links to Fantastic Adventures, March 1940.”