This issue is a variant of Aquaman (DC, 2016 series) #42 [Eduardo Pansica & Eber Ferreira Cover].
Cover does not feature title logo
Characters are depicted as they are in the Aquaman 2018 movie.
Drowned Earth tie-in
Drowned Earth story continues from:
Justice League / Aquaman: Drowned Earth (DC, 2018 series) #1 Part One
Justice League (DC, 2018 series) #11 Part Two
Story continues in:
Justice League (DC, 2018 series) #12 Part Three
Aquaman / Justice League: Drowned Earth (DC, 2019 series) #1 Part Four
This is Dan Abnett's final issue as writer. His run started in Aquaman (DC, 2011 series) #49-52, continued in Aquaman: Rebirth #1 and then from issue #1 of this series.