experimental fishery station; fisheries research station
A research facility focused on fisheries, aquaculture, and marine resources.
They are researching new aquaculture techniques at the fisheries research station.
水産研究所 is a more general term for a fisheries research institute, while 水産試験所 often implies a facility focused on experimental and practical testing.
Compound of 水産 (fisheries) + 試験 (test, experiment) + 所 (place, facility).