Harlingen Pets - (956) 425-8488

This is also the only guy carrying saltwater aquarium stock and equipment in Harlingen. He has corals, fish, liverock, all the things you'd expect at a good saltwater aquarium shop and his stock are always in good condition proving he knows what he's doing.

I really like this store. They have everything from dog care items to goldfish. The prices are a bit high, but you pay extra for better service than you get from anyone else.