Bottled Letter Seashore Mystery! (ビンづめレター海辺の怪！, Binzume Retā Umibe no Kai!) is the 69th episode of Urusei Yatsura.
Lum, Ataru, Ten, Shinobu, and Mendo are vacationing at the seashore. The boys find bottles containing love letters from a young woman who lure the gang to a strange clam-shaped inn, where the residents quite literally want them for dinner.
Differences from the Manga
Both versions are practically the same with each half covering each chapter. The only changes are:
- The inn’s phone being out of order in the anime.
- The giant clam doesn't close in the manga, the giant and old lady come and are subdued in the girls' room and the young lady who came back in the inn witness her comrades defeated in the room thus leaves.
- After the young lady leaves on a shell, the giant and old lady arrive and prepare to leave on a shell, begging the gang not to follow them as well.