Summer of Horror Series - Curse of The Black Crab (夏の怪奇シリーズ, 黒い蟹の呪い Natsu no Kaiki Shirīzu, Kuroi Kani no Noroi) is the fifteenth episode of Ultraman Ace.
As a boy named Yumeiji mourns his father's death by the ocean, he sees a fisherman get pulled into the water by a spiny tentacle. Yumeiji makes friends with a girl and shows her his special shell, which allows him to talk to a crab he thinks is his father. The crab warns him that a monster is coming.
- Ultraman Ace Volume 4 features episodes 13-16.