[3] However, in February 2010, Sendai express canceled its investment in the relocation due to the lack of prospects for raising funds.

[6] In 2011, the Tōhoku earthquake and tsunami caused seawater and mud to flood Marinepia Matsushima Aquarium, breaking the circulation pump.

[10][9] Inherited from the Marinepia Matsushima Aquarium are Commerson's dolphins[11] and finless porpoises, along with fish from the Sanriku region.

Inside there is a dolphin and sea lion show pool that can accommodate about 1,000 people.

[12] The aquarium has a focus on rearing and exhibiting blue sharks as representative fish from Sanriku.

[14] A blue shark was later captured in 2018 and survived in captivity for 873 days until it died in December 2020, significantly increasing the record.