This is a place I would strongly recommend if you have kids, enjoy looking at animals, or have an afternoon to while away. Be warned though, tickets are quite pricey at 28,000 won for adults, so if you’re not keen on looking at exhibits and animals then I would advise you to give this a miss.
(read more here: https://vypinkorea.wordpress.com/2017/08/10/coex-aquarium/)