Songkhla Aquarium
39 Leam Son Onn Rd. Bor Yang, Songkhla
This sign of entry fees reads (in Thai) that Thai children cost 80 baht; Thai adults coast 150 baht; and people (Thai people) over the age of 60, disabled or shorter than 99cm are FREE.
Is it worth the 300 baht for “Foreign Adult” (or 200 baht for “Foreign Children”)? No. Here is a Trip Advisor review: https://www.tripadvisor.co.za/ShowUserReviews-g317134-d3748451-r326634666-Songkhla_Aquarium-Songkhla_Songkhla_Province.html