Following two volumes of mostly surface-dwelling adventures the fish-out-of-water story of Mermin the, well, Mer-kid, is set to submurge its star and his human friends far beneath the waves. Mermin Book 3 Deep Dive by Joey Weiser is due out in September from Oni Press, which will take readers to Mermin's native kingdom of Mer... along with its rival kingdom Atlantis. Oni has provided ComicsAlliance with a first-look at the latest installment of the Mermin epic that sees the young hero confronted with the responsibilities of his station. It... may not go well.

From Oni's official announcement info:

No one knows much about Mer, the underwater kingdom where Mermin the merman was born, but due to a rising conflict with the people of Atlantis, Mermin is needed back home immediately. Which means that his human friends get to accompany him and see all the aquatic wonders of Mer. But once again, Mermin is tight-lipped about his past – even when it’s swimming right in front of him. And there are enemies lurking in the seedier depths of Mer, who’ve got their sights set not only on Mermin, but on Pete and his friends!

You can scope out six pages from Mermin Book 3 Deep Dive below.