This is Aquaman 2, published by Mimosa (SA Magazine Co) in 1963.
It reprints the cover and story from DC Comics' Aquaman 7 (1963):
"The Sea Beasts from Atlantis"
Also reprinted is this story from DC Comics' Adventure Comics 248 (1958):
"The Traitor of the Seven Seas"
32 pages, glossy colour cover, black and white newsprint interior.
Here is the cover of issue 2 and DC Comics' original cover: