My Little Pony: Set Your Sail is a limited-run Hasbro-licensed series of full-color comics by IDW Publishing. Based on My Little Pony Generation 5, it centers on the Mane 6 visiting a kingdom of seaponies. Issue #5 was released as the last issue in the series.
"Set your sail for the Seven Seas because the Seaponies are swimming into comics for the first time ever! See the mane six totally transformed. Pestering the queen into sending messages in bottles to the fabled Seapony kingdoms is just one of the many perks to having royal besties...which is exactly what Izzy has been doing ever since first reading about mythical Seaponies in Sunny's old history book. So when Queen Haven hears back from the Queen of the Sparkling Seas, Izzy is eager to dive into the adventure of a lifetime. Pipp, on the other hoof, is not excited about her princess duties or having to reschedule a new song release (plus, saltwater totally ruins her shiny mane). The voyage should be smooth sailing, but the tides are changing, a storm is brewing, and Izzy and Pipp are swimming right into it..."
"Pipp was totally salty about being sent to the seven seas for princess duties, so when Zipp receives an oddly chipper message from her sister, Zipp is more suspicious than a clownfish in a clamshell. She takes matters into her own hooves—er, fins and travels to the Sparkling Sea where she meets Princess Anemone. The sea princess' odd behavior and Pipp's absence make Zipp wonder if she can trust the seaponies and if their sparkles are only scale-deep."
"Ah, another beautiful day in the Sparkling Sea— krrzzhh— Ahoy there, squids and scoundrels! Pull up a clamshell and listen to our tale of captured princ—krrzzhh— Ahem, sorry about that, everypony. It seems our solicit was interrupted by some sort of pirate radio signal... Whoever that was definitely wasn't going to say anything about a captured princess. Nope. Everything is toootally fine under the Sparkling Sea. Princess Pipp Petals is on a super-standard diplomatic mission, and any meddling princess sisters do not need to worry about her whereabouts or the crumbling coral around the palace. Please enjoy this completely not suspicious comic!"
"Despite what the songs say, everything is not better under the sea! The flowers are leaking green ooze, the food is filled with sand, and the coral is dying. The water is growing more treacherous, and it’s up to the newly seapony-fied Mane Six and their ragtag group of pirates (and princesses) to get to the bottom of things, even if that means exploring the dark trenches everypony fears. The barnacle-covered truth of the Sparkling Sea is soon to be revealed."
"LAND HO! Er...THE END OF THE SERIES HO! When Pipp and Izzy set sail for their underwater adventure, they hoped for smooth waters, but the seven seas are falling apart! Queen Calla Lily has been hoarding stolen power, and until the seven anchors are returned to their rightful kingdoms, all ponykind, under the sea and on land, is at risk. Luckily, a swashbuckling crew of pirates have recruited Princess Pipp and her besties to save everypony. With the Mane Six at the helm, nothing can stand in their way!"