sentences:  In 2011, three dozen fishes of the two species were on exhibit.Prior to opening the Open Sea wing in 1996, the aquarium established the Tuna Research and Conservation Center in 1994 in partnership with Stanford University's Hopkins Marine Station.Staff scientists and Barbara Block—professor of marine sciences at Stanford University—have tagged wild Pacific bluefin tunas to study predator-prey relationships, and have also investigated tuna endothermy with captive tunas at the center.