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〜
Alternative titles: Hamtaro OVA 2, Tottoko Hamutarou: Hamuchanzu no Takara Sagashi Daisaku Hamuha! Sutekina Umi Nonatsuyasumi
Type: OVA
Source: Unknown
Episodes: 1
Status: Finished Airing
Aired: Mar 1, 2003
Duration: 44 min
Rating: PG - Children
Studios: TMS Entertainment
Demographics: Kids

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)