All the info. you need is already on this site, click on 'Corfu Guide' at the top of the page, then click on the map, the seaside resorts nearest Aqualand are probably Ermones, Glyfada, Pelekas and Ag Gordios on the west coast and Kontokali, Gouvia, Dassia, Ipsos and Barbati on the East.
As previously mentioned Aqualand is a resort in itself, mostly all inclusive but not all, there are several good places to eat in the vicinity, notably in Ag Ioannis there is the Cockerel Taverna on the Main road to town and Kosta's in the square in the old village(turn left at the cockerel).
Going towards Kokini (north on the main rd.) is Spiros and Vassilis - french cuisine and quite expensive, about 100 metres further down on the right is Angeliki's which is a gem, simple plain traditional food and drink, in my experience the best value on the island.
Further on past the roundabout going towards Paleokastritsa is Nakos which was recommended by Emma Tennant in one of her books.