Hi, just visited Coral Wonderland at Malacca. http://coralwonderland.com.my/
the visit for Singaporean Adult RM40 while child is RM30, so price is quite high for a 40mins visit. The only nice part is the exhbit where you can walk in to feed the black tip reef shark as well as the hawkbill turtle (you have to pay for the feed).
There are also a couple of videos in Youtube of the place. It is quite fun to as there is a touch the sea creatures area. The tanks of the fishes are quite healthy but I thnik they are having a "old tank" syndrome, where the fishes are dying one by one. They need to maintain it well as I start to see diatoms growing on their sandbed.
They have a nice collection of about 5 tank with variety of corals but many are not fully open (I went in just about opening time in the morning - the first visitor)
They have a little worksheet which you have to go to several stations to "chop" the answers, and upon completion to redeem a plastic key-tag.
Overall is it worth the money? I rate it 2 shells out of 5.