The Nauti Mermaid has a very good happy hour, with a few $5 food specials. I've also done a fair bit of take out fromOutside of the happy hour, the fish tacos and mahi-mahi sandwich are tasty. Avoid the bisque as it much too creamy. The jerk chicken is a good choice if you are looking for a non-seafood option.
The restaurant itself is very cozy with several 4-person booths and perhaps a dozen seats at a small bar. They also had live music during the Friday happy hour I attended, which we all agreed was more annoying that enjoyable especially given how loud it gets in a small space with wood walls from the usual restaurant commotion.