Issue 89
World's Finest Comics (1941-1986) #203
Superman and Aquaman must battle Dolphin-Men, amoebic mutants with telekinetic powers and a wish to destroy the human race.
Creators

From
World's Finest (1941-1986) Series
Superman and Aquaman must battle Dolphin-Men, amoebic mutants with telekinetic powers and a wish to destroy the human race.

From
World's Finest (1941-1986) Series