My son is very much interested in sea creatures and he has learnt a lot by watching The Octonauts on tv. If I’m going to be honest, so have I. We try to go to any decent Aquariums we come across as we know it will be a good day out. Luckily the Oceanarium in Lisbon is absolutely brilliant if a bit on the expensive side. The otters are our favourite although the shark on the main tank gets the most wows.