I went scuba diving in Thailand while on Phi Phi Island. This is on the West coast of Thailand and the body of water is called the Andaman Sea, it is a part of the Eastern Indian Ocean and it is separated from the Bay of Bengali by the Andaman and Nicobar Islands.
I chose Princess Divers for my dive and Felix was an excellent companion for someone who does not do a lot of diving but is a certified open water diver with both PADI and NAUI. Here is little clip from the dive: