It's not anywhere near the level of a sealife cent...

It's not anywhere near the level of a sealife center or London aquarium, made worse by the fact it was so busy.
Don't go there during school holidays.

Edit following response from the deep: the management knowing that the facility was going to be seriously over capacity is entirely their responsibility and makes having been there on the day even worse, as a customer who has never been before I can not make that judgement from outside or before I left my house 70 miles away.