- Script
- ?
- Letters
- typeset
With production credits and indicia at bottom
- Script
- Hisashi Sakaguchi; Alan Gleason (translation); Toren Smith (translation)
- Pencils
- Hisashi Sakaguchi; Tomoko Saito (touch-up art)
- Inks
- Hisashi Sakaguchi; Tomoko Saito (touch-up art)
- Letters
- Tomoko Saito
- Genre
- adventure; humor; science fiction
- Characters
- Black Echo; Mitsuru "Hap" Happo; Eiko Higure; Cap'n Pepi; Dolphin; Mao; Shiro Osawagi; Black Side
- Reprints
- Keywords
- boomerang; pirate; whale