This Boy Caught a Merman is an OVA. It was released on November 9, 2012 in Japan.
English Voice Cast
- Isaki - David Matranga
- Shima Kawauchi - Leraldo Anzuldua
- Gen Kawauchi - John Swasey
- Shima's Father/Undertaker - Justin Doran
- Shima's Mother - Emily Neves
- Kusatsu - Greg Ayres
- Koami - Carli Mosier
- Funairi - Nancy Novotny
- Furue - Blake Shepard
- Voice on Telephone - Allison Sumrall