Tottoko Hamtarou OVA 2: Hamuchanzu no Takara Sagashi Daisaku - Hamuha! Suteki na Umi no Natsuyasumi
English title: Hamtaro: Ham-Hams Ahoy!
Japanese title: ハムちゃんずの宝さがし大作戦〜はむはー!すてきな海のなつやすみ〜
Type: OVA
Episodes: 1
Source: Unknown
Studios: TMS Entertainment
Duration: 44 min
Rating: PG - Children

As Laura heads out to summer camp, Hamtaro and Oxnard come across a young girl by the name of Haibi, who's trying to find the ocean. Haibi found a treasure map while searching through the storage burrow and is now willing to find the treasure to help her heat exhausted granny. The Ham-Hams, who are more than willing to help her, pack their things and set out to find the treasure.

(Source: Wikipedia)