Story: Harry Harrison
Art: Dan Barry
Summary: Seeing his friends off as they prepare to make their way back to Earth after surviving the horrors of Mongo’s dinosaur caves (see D2-080 Dinosaur Valley of Mongo), Flash stays behind to answer an urgent summons from King Trigon of the undersea utopia of Neptunia (see also D2-041 H-Bomb Under the Mongo Sea).
On being told that unknown human predators are harvesting precious underwater resources belonging to the pacifist Neptunians, Flash agrees to investigate, and it is not long before a new raiding ship with remarkable properties arrives...
On being told that unknown human predators are harvesting precious underwater resources belonging to the pacifist Neptunians, Flash agrees to investigate, and it is not long before a new raiding ship with remarkable properties arrives...
(Source of summary: www.ipcomics.net)
Collect it and many more D2 - Here
It's from Emile's e-collection. All credits go to her & "Allen Lane" who scanned and first shared at net.