@DavidBrown I have visited 10 Sea Life Aquariums in 4 countries. Each is essentially a 45-minute visit and in truth they are not very memorable zoo stops. However, generally speaking, the ones I've seen in Europe have been more expansive than the small American locations.
Sea Life Arizona (2011)
Sea Life Minnesota (2014)
Sea Life Grapevine - Texas (2015)
Sea Life Carlsbad - California (2017)
Sea Life Michigan (2018)
Sea Life Scheveningen - Netherlands (2019) - Humboldt Penguins and Small-clawed Otters
Sea Life Blankenberge - Belgium (2019) - California Sea Lions, Humboldt Penguins and Small-clawed Otters
Sea Life Konigswinter - Germany (2019)
Sea Life Oberhausen - Germany (2019) - Small-clawed Otters
Sea Life Hannover - Germany (2019) - has a Tropical House