Is the aquarium at Dehiwala Zoo worth the extra ticket.

While it does feature a decent variety of local freshwater fish and some colorful reef species, the tanks are quite dated. If you are a serious marine life enthusiast, you might find it underwhelming.

However, if you are visiting with young children, it is dark, cool, and fascinating for them, making the tiny extra cost totally worth it for thirty minutes of peaceful entertainment away from the heat.