Thank you for your review, together with our charity we value your feedback! We do limit number of visitors in each time slot that we have, however more popular tanks may become crowded if people decide to sit and watch our exhibits. If this does happen to do recommend moving forward as you can loop back around as many times as you want! We also thank your for understanding our mission to provide conservation and education of marine life, it is very much appreciated! We hope you can use your Complimentary Annual Return Pass to re-visit ! All the best Team NMA!