Jim, Dehdeh and Ruka's mom finally track down Anglade's yacht, but neither the rogue scientist nor Umi or Ruka are on board. All that remains is a cryptic invit

When Ruka was younger, she saw a ghost in the water at the aquarium where her dad works. Now she feels drawn toward the aquarium and the two mysterious boys she

Ruka, whose father works in an aquarium, and her two friends hear strange calls from the fish in the sea, while the adults, unaware of the children's experience

The battle for the Mud Whale becomes a deadly rout as the Marked fight to protect their home and their comrades from the invading apátheia soldiers. Meanwhile,

Collection of poems about the sea, accompanied by watercolors by the artist Meilo So.