The Mourning Shrines, situated underwater on the planet of Mon Cala, served as a memorial. This memorial featured several towering blue sculptures honoring prominent Mon Calamari figures, notably Admiral Gial Ackbar. Coral formations and eels populated the area surrounding the memorial.
During a Resistance mission to Mon Cala in 34 ABY, General Leia Organa paid a visit to the Mourning Shrines with Aftab Ackbar, the son of the late Admiral Ackbar, to pay her respects. While there, Aftab placed a shell within the mouth of one of the statues, in the belief that his father's soul resided there. Aftab expressed his gratitude to Organa for her visit to the shrines, even though he knew it wasn't the primary reason for her being there. Subsequently, the two departed in a submarine.
The Mourning Shrines made their debut in the second issue of the Star Wars: Allegiance mini-series by Marvel Comics. Ethan Sacks wrote the comic, Luke Ross provided the illustrations, and it was released on October 16, 2019. A preview of the shrines was initially shown on October 9 of that year on StarWars.com.
The 2022 video game LEGO Star Wars: The Skywalker Saga, published by Warner Bros., included a mention of the Mourning Shrines.
Within LEGO Star Wars: The Skywalker Saga, players have the option to launch an assault on the Mon Calamari MC80 Star Cruiser Home One. Should they choose this path, they will encounter Captain Fo Skoolan, a Mon Calamari, aboard the cruiser. Skoolan voices his anxieties about his mortality, declaring that he wasn't ready to be among those memorialized at the Mourning Shrines just yet.